Hi Craig!

There are two systems available here in germany. The on thing will not suite your needs, as it is only 35MHz. It is the ACT diversity-set. Two 10channel-receivers switched together. All channels are fully programmable in the rx. It is possible to use two different frequencies. Therefore they made a new module which is a two in one system. You just put it in your 10X and your ready to transmit on two channels. The recievers always use the best signal.

The second system is the Emcotec DPSI twin. You can connect two recievers to that "BOX". The emcotec-guys use a second module in the TX on a different band. They have a 35MHZ and a 40MHZ-module in a Graupner MC24. I am not sure if that is in any way what you were looking for, but that should safe a few jets.

BR,

David