Thanks to the two kind people who have sent me private messages, but I think you can probably get a better deal than me.
The request was the result of a discussion in the clubhouse, when we were moaning again about the ancient - probably 1950s - Narco radio that we use as a receiver. It occurred to me that avionics companies might be piling up old stuff - stuff that's too old for resale in the US - and thinking "skip". It seems terrible to just chuck stuff......
thanks again
Bernie