If the LRP C3-RX does work, and I imagine it will (it's FHSS after all), you can get one for a steal at the moment included in this Tx kit:
http://www.lrp-shop.com/xWS_Detail.php?aid=87000
I just picked it up for this reason and was able to bind the Rx to my existing Sanwa MX3 FHSS setup.
You could always flick on the boxed radio minus Rx for €20 or €30 immediately...