These are Actel A1020B-PL68C Field Programmable Gate Arrays
These are factory new parts. They have never been installed and have not been recovered from manufactured electronic components.
Actel currently sells this ProASIC Plus Flash FPGA for $42 in single quantities.
http:// /documents/RadTolerant_DS.pdf
Always an alternative at Press Send is barter. We have interest in vintage test equipment; amateur radio gear; and pre-dinosaur electronic wonders in working condition.