I have collected a few enclosure pix:
http://www.thewarfields.com/MTLatheCNCDrivers.htm
There are a variety of styles including rack mount enclosures (19" equipment rack) as well as the NEMA enclosures that have the rubber gasketed doors. Someone on CNCZone was buildling and selling some of the enclosures pictured, MTLaws or a name like that, I have forgotten.
I'm working with a couple of rack mount chassis I got off eBay for my CNC Lathe's enclosure.
Best,
BW