There is currently one listed on Ebay (#400212697245) in a Compur 2 shutter. That's probably what you need. Have a look through this old thread on photo.net:
FWIW, I have a convertible 240mm Symmar mounted in a modern Compur 3 shutter. Also currently on Ebay (#181170420857) you'll find one in a Linhof Compur (3?) and another (161058477231) in an electronic Compur 3.