Trying to rehabilitate a Legend 600x Supreme case (dead mobo) - any ideas what might fit inside??? (photo included)

I'm having trouble conceptualizing things to do with a Packard Bell Legend 600x Supreme case with all its guts minus motherboard (386SX-20 mobo is dead) and original hard drive. The 60w power supply is still in reasonably good condition, disk drives and a CF IDE adapter as hard drive. The case's form factor is unique, and I don't really want to spend good money on another crappy Packard Bell motherboard/cpu combo.

The power supply, although small, seems more than enough to power about anything in the 386 or 486 range, even possibly any first generation pentium (draw is about 15w max for those I think). The problem becomes the case's unique and rather cramped form factor.

That said, everything else still works, is in good condition, and I do like the case. Anyone have any ideas what to do with it? I'd really love to rehabilitate it!

Photo of open case here: https://i.imgur.com/inLszhn.jpg