Sanwa Receivers - options?

[andys]

I use an older Sanwa Super Exzes - I have a couple of Sanwa receivers and a couple of Ansmann 3.1 receivers.

Is there anything else out there that works - as both of these receivers seem rare these days?

If not - what kind of module is the Sanwa TX?
There are Futaba and JR 'Orange' TX modules on Hobbyking that use sensibly priced receivers - will one of these work in the Sanwa, or is the module for Sanwa stuff Sanwa only ?!

Cheers.