dude i couldve has a whole machine about 6 mos ago for cheap but passed because it was beat and the home model.. will email the guy and see if he happens to still have it.. not holding my breath though..
Isn't that the Embedded Z8 with the built-in ROM chip?
Finding one of those will be like hen's teeth. You might be able to find one of the oddball CPUs with the stackable ROMs easier than the pre-programmed CPU.