Blatant plug:
Ebay #110793243680
Unused IMSAI 8080 Front Panel, wired for optional Memory Protect
switch. The former owner was going to use this for a S100 project, but
never got around to it.
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology
http://sturgeon.css.psu.edu/~mloewen/Oldtech/