try here:
Timing Belts | Cable Chains | Gear Drive Belts | Gear Drive Chains | Polyurethane-Nylon-Delrin-Neoprene | WM BERG Engineered Mechanical Components
theyve got a narrow one, could run multiple belts...
Circular Pitch : 2
Material : NEOPRENE
Type : TIMING BELTS
Length : 121.9
Berg's ® Name : Max-M-Drive®
No. Of Pitches : 60
Belt Width : 3
Mating Pulley/Sprocket : Operates with TP7 series.
Operating Speed : 20000RPM
Operating Temperature : +85ºC to -34ºC
PDF File name : M05A101
Catalog Page Number : MA101
need to see if its a similar tooth profile, there are at least several tooth profiles in the round tooth styles, slight differences in tooth profile, and/or distance from tooth tip to cord centerline, this affects the effective pitch diameter. we just went thru this at work on some big 100 hp drives, htd/polychain/panther all use variations, some sprockets will run one or two profiles, none run all 3.