I just added a link to OsmondPCB and gerber files to the Superproto Wiki in case someone wants to build their own PCBs.
http://willegal.net/superproto/index.php?title=Main_Page
In case you weren’t aware of it, the SuperProto is an Apple II prototyping card designed with EEPROM and the basic Apple II hardware interfacing circuitry “built in”. This makes implementation of some types of Apple ][ interfaces much more straightforward than doing it all from scratch.