When I went to high school the school had some 286 Commodore machines.
They looked just like Amiga 2000 machines, so the first time I saw them my heart went racing like crazy, but then I was dissapointed...
Dunno how amiga compatible the Commodore PC Case was in respect to house an Amiga 2000 motherboard, naturally I never took those apart. But the only differences you see was in the lower left hand corner of the front it said Commodore Business Machines and some PC model name 286 blah blah.
Some pics of other CBM PCs, amogst these the here (could not find the one I saw):
linkyThere is for instance a pic of the CBM PC-50-II which case ended up being adapted for the Amiga 4000.