4100 case upgrade/replacement

at work we're moving the office, well my old 4100 got pretty smashed up in the move, but it still boots just fine. the Boss says i can get a new case. So i got to wondering, will the insides(MoBo, HDD, CD, blah, blah, blah) of my 4100 fit in a more modern Dell case?? I've been lookin at some of the optiplex, some are pretty low profile and would be great to tuck under a desk, i just dont want to buy if my MoBo and gear wont fit.

suggestions are welcome.