Clone Apple II plus motherboard

[Mike <mike@bogus.address.net>]

In the early 80s, my uncle built a clone Apple II plus.  I still have the 
motherboard, it worked the last time I tried it.  I don't think he designed 
the schematics, however. He did have the board made and put it together.  
(Using facilities at the JPL where he worked at the time.)

The specs:  64K of main memory (integrated language card).  Slot 0 is for a 
ROM card.  Slot 4 does not exist, as this board has a built-in 
SoftCard-compatible Z80, which appears to software as being in slot 4!  The 
board has all the standard Apple II+ connectors near the appropriate 
places.  The ROM card has the Apple II+ ROMs.  This board will fit in a 
standard Apple II/II+ case.  It doesn't have the video and cassette jacks, 
as there were wires soldered to the pads on the board, because the case was 
just a metal box, and the jack had to be placed externally.

My question is, has anyone seen a board like this before?  I used to have 
the schematics, but they've been lost over several moves.  I'd be 
interested in getting a new copy, if they exist.

Mike