Hypothetical- this wouldn't be cost effective and might not be feasible, but...
Coudn't you buy parts from intel macs and assemble them in your own case?
I seem to recall livingfortoday doing something like this with a sawtooth (minus the intel)...
You could, but the cost would be prohibitive. It's easy enough to get RAM, CPU's, hard drives, etc, but the motherboards are impossible to find, so that would cost a bundle.
And yeah, I did that with a Sawtooth (which I still have), but it was chap for me since there are so many parted ones on the market. It's really hard to find a motherboard for an Intel Mac at a low price nowadays. maybe in a few years...