Not sure if it'll help you, but you can buy various ISA riser boards which feature male and female edge connectors on opposite sides of the board. They're also sold as ISA prototyping and vector boards. Google can find a source of them for you.
If you specifically want 100 pin edge connectors, Amigakit.com do sell
Zorro riser boards and right angle adapators, which are simply a 100 pin male and female edge connectors on a board.
