Any telephone transformer with the standard 600 ohm primary and two 600 ohm secondaries will work, regardless of manufacturer.

 

DigiKey has this one that should work just fine as a substitute:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=237-1123-ND
Datasheet: http://www.netsuite.com/core/media/media.nl?id=2012&c=ACCT126831&h=c48cb8a28141ee00e97f&_xt=.pdf

224 in stock at the moment.

 

Saweet, Thanks!

 

Just put it in service today. It worked great, and was about half the size of the Stancor TTPC-9.

A new module would have cost $300, and all it was is this transformer, box, three wires, three plugs.