Where do you live?
I'm in Southwestern Ontario and I want to sell a machine that I think would make a nice 5 x 10 plasma table. Way too big and heavy to ship, so it would need to be a local sale.
The other thing I have is a new (never used) kit with carriages and what not. I believe it was "no sleep studio" "shopdroids" that I bought it from. I bought it a few years back. It would require you to buy IVT rails for the V groove. I don't recall what series of 8020 it's compatible with. I'd need to look it up, which I'll do if anyone is interested.
That kit can be shipped anywhere, but the machine can't. Let me know if you are interested in either via PM for pics and more discussion.
As for the design, 8020 does have some CAD stuff you can download to make your life easier when designing with their parts. They have an autocad add on plus files and things available for different programs I believe. It's been a few years since I messed with it, but I'm sure it's still there.