Ask and you shall receive!
Here's a list of some, or all, of the printers based on a Canon LBP-SX Engine which use the stepper motors you seek. These are the same motors that I use on my JGRO CNC router. Happy hunting!!!
For those that may have missed it, and since the download section is currently a WIP, attached is a repost of my HP LaserJet II/III/IID/IIID Spec./Info Sheet that I compiled while building my CNC table. If anything is in error or you would like to see other information included please feel free to email me.
Acom Computer Lx3808
Acom Computer Lx3808d
Acom Computer Lx4808
Alps LSX 1000
Apple LaserWriter IIF
Apple LaserWriter IIG
Apple LaserWriter IINT
Apple LaserWriter IINTx
Apple LaserWriter IIsc
Applied Comp Science ACS LJIID
Birmy Graphics PAL
Birmy Graphics PAL Plus
Blaser II
Brother HL-10dps
Brother HL-10dv
Brother HL-10h
Brother HL-10ps
Brother HL-10V
Brother HL-8
Brother HL-8D
Brother HL-8E
Brother HL-8PS
Brother HL-8PS/AP
Brother HL-8V
Business Sys Intl Lasersoft Print III 8p
Canon FAX L3100
Canon FAX L4600
Canon FAX L4600e
Canon FAX L920
Canon LBP-200v
Canon LBP-8 II
Canon LBP-8 II R
Canon LBP-8 II T
Canon LBP-8 III
Canon LBP-8 III Plus
Canon LBP-8 III R
Canon LBP-8 III T
Canon LBP-8sx
Canon LBP-RX
Canon LBP-SX
Canon LBP-TX
Chelgraph Prod Proofing Printer
Compugraphic Cg408
Computer Language RES FormWriter 2EX 8pp
Computer Language RES FormWriter 2exd 8p
Computer Language RES FormWriter 2MX 8pp
Comterm Laser II
CPT LP-8
Data General 6454
DEC Declaser 2100
DEC Declaser 2100 Plus
DEC Declaser 2150
DEC Declaser 2200
DEC Declaser 2200 Plus
DEC Declaser 2250
DEC LN 05
DEC LN 06
Digital Laser Sys Plus 141
Eicon Laser 400
Eicon Script 400 Version 1
Eicon Script 400 Version 2
Electronic Forms Sys 2EX
Electronic Forms Sys 2exd
Electronic Forms Sys 2MX
Frostbyte JPS Maxx/8
GBT 6606 XP
GBT 6636 LX
GBT 6636 XP
Genicom 6000
Genicom 6140 AceWriter
Genicom 6142 AceWriter
Genicom 6145
Genicom 7610
Genicom AceWriter
Gestetner Corp GLD 801
Gestetner Corp GLS 800
Gestetner Corp GLX 801
Gestetner Corp Laser 800
Gestetner Corp LX 800
HP 33440 A LaserJet II
HP 33447 A LaserJet IID
HP 33449 A LaserJet III
HP 33459 A LaserJet IIID
HP LaserJet II
HP LaserJet IID
HP LaserJet III
HP LaserJet III/MAC
HP LaserJet IIID
HP LaserJet IIID/MAC
IDS Lpc3
Imagen 2308/S
Imagen 2308/S Turbo
Imagen 3308/S
Imagen 3308/S Turbo
Imagen Imagestation/S
Infotec FAX 6745
Interface Systems 7028 Micr
Interface Systems 7028-D Micr
Interkom I-4909
ITT Courier Alcatel 8378
ITT Courier TL 410
ITT Courier TL 412
Iverson Tech 80T Series
JPS Maxx/8
JPS Maxx/8-2
Laser Connection QMS Ps810
Lasermaster 1000 PC
Lasermaster 1000 PS/2
Lasermaster 800
Lasermaster 800 Turbores
Lasermaster Lasermax 1000
Lasermaster Lasermax 1000kx
Lasermaster Unity 1000
Lasermaster Unity 1000-J
Lasermaster Winprinter 400/8
LEE Data IS-482
Mitek Systems Model 108te
Mitek Systems Model 130t
National Televar Turbosetter 1000
NBI Lp910
NBI Lp911
NEC SilentWriter 260
NEC SilentWriter 290
NEC SilentWriter 990
NEC SilentWriter II Model 260
NEC SilentWriter II Model 290
NEC SilentWriter II Model 990
Newgen Sys Turbo PS/300
Newgen Sys Turbo PS/360
Newgen Sys Turbo PS/400
Newgen Sys Turbo PS/480
Newgen Sys Turbo PS/630
Newgen Sys Turbo PS/630en
Newgen Sys Turbo PS/660
Newgen Sys Turbo PS/840
Newgen Sys Turbo PS/840e
Newgen Sys Turbo PS/880
Next Comp Laser Printer
Norsk Data ND Laser
North Atlantic Kiss Plus T
North Atlantic Laser IID-T
North Atlantic LaserJet II T
North Atlantic PS 810 Tempest
OCE 6025
OCE 6127
Olivetti LP 5000
Olivetti PG 108
Olivetti PG 208
Olivetti PG 303
Olivetti PG 840
Panasonic Panafax KX-F5000
Philips P3580
Pitney Bowes 9200
Pitney Bowes 9250
Pitney Bowes 9400
Printer Works SX-29000
QMS 2308/S Turbo Imageserver XP
QMS 3308/S Turbo Imageserver XP
QMS Kiss Plus
QMS Kiss Plus Macsyst
QMS Lasergrafix 810
QMS Lasergrafix 820
QMS PS 810
QMS PS 810 Turbo
QMS PS 815
QMS PS 815 MR
QMS PS 820
QMS PS 820 Turbo
QMS PS 825
QMS PS 825 MR
R2d2 Turbosetter 1000 Plus
Raster Developer Direct Trendsetter 1000
Ricoh FAX 2800di
Ricoh FAX 2800l
Sagem LZ 810
Sagem LZ 820
Savin Savinfax 630
Siemens DR 400
Siemens Highprint 7800
Star Micronics Laserprinter
Star Micronics Laserprinter 8II
Syntrex Desktop Laser 1
Talaris Systems T-811/2
Tandem 5573-D
Tandem 5573-LX
Tandem 5574
Tandem 5574-PC
Tandem Laser-LX
Tegra XP-800
True Tech 1000
U S Laser Corp BDS 630/8E
U S Laser Corp PS JET Plus
Wang LDP-8
Wang LDP-8 III 8 PPM
Wang LDP-8 III-D
Wang LDP-8-DSK-T
Xante Corp Accel-A-Writer 8000