I contacted George and he has no interest in making any more of these or offering any more information other than what is on the web site.
I inquired about making some of these and basically it comes down to this. The board uses very small VIA's and must be redesigned in order to be produced by most circuit board manufacturers. I finally found one company to do this and (2) bare boards were quoted at almost $100.00 including shipping.
Secondly in addition to the Amber chips you need the rest of the Amber circuitry (special ram, ect)from 2 Amiga 3000's to make just 1 board. You will meet with some resistance from the community for just this reason alone.
Overall it's a very cool project but when you add it all up it isn't very practical. That said I do have enough DEAD 3000 parts to make 1 board. If you have some bare boards made count me in for one depending upon the cost.
Good Luck,
Jeff