[volt-nuts] Fluke 5200A extender board.

[Mark Sims]

There is also one listed on Ebay for $9...
http://www.ebay.com/itm/TRW-Cinch-50-86C-30-43-Pos-Double-Wire-Wrap-PC-Edge-Connector-New-Old-Stock-/171213916405?pt=LH_DefaultDomain_0&hash=item27dd2508f5
If you have access to a PCB layout program you can easily make the circuit board/edge tabs.  OSHPARK.COM will make you three boards for $5 per square inch.   You could either make a full hard-extender or do the ribbon cable thing...  which would be fairly easy since the connectors are 0.1" spacing with wire wrap pins and could plug two 50-pin ribbon cables directly onto the connector (with a little futzing where the two connectors come together.  
I could try and make a small edge tab board and put it on OSHPARKs "shared projects" page where you could order them from.  I would need to know the spacing of the edge of one of the end fingers to the edge of the board.  Would also need to know the length of the edge tab.