Where to get a Sanwa Receiver Repaired

[andy110m]

Hi,

I've stupidly just plugged my lipo in backward and everything is working, speedo amazingly is fine but the Sanwa 471 receiver isn't.

It doesn't smell burnt but all is not well. Does anyone repair these, I remember a chap called Derek used to do speedo's, can he do receivers?

Any advise would be welcome please.

Thanks.