This actually makes me curious as to how they construct these things, what parts they use, etc.
I haven't seen this done personally, but surely it's been done at least once before? Really I just wonder what modding you'd have to do - they could have just a custom I/O and an awkward but standardized board, but they could also have totally wonky proprietary parts and a platform that isn't even x86. Probably depends more on how old it is than anything else.
Can you open some of those boxes up and share what's inside?