I have an extensive set of Bart's custom 2.X parts, including the metal gantry parts, the milled plastic parts, the aluminum air assist nozzle, the original buildlog parallel port interface/driver board (
http://www.buildlog.net/blog/2011/04/la ... river-pcb/ ). I also have some optics, but I donated at least some to the local hackerspace a few months back, so I'll have to check exactly what's left. I also have a 40W tube and power supply from lovehappyshopping on ebay, but I've had the tube for almost two years, so it's likely not of much utility for cutting any longer, and I wouldn't feel comfortable shipping it anyway.
I designed and built a very large cutter with a travel of one meter on each side, but was never able to get such a large machine to align. The parts have been sitting unused for over a year. I'll do some soul searching over the next few days to see if I'm willing to give up some of my mad scientist cred and sell these parts to someone who will use them, especially if they're difficult to find these days. I'll also try to post pictures, so you'd know exactly what you're getting.