we have been looking for one as well, i think we may have found one via the guy that looks after the tri series timing.
ill ask around and see what i can find for you.
what is the main glitch your having?
we were having problems with noise feedback from the loop not picking cars up, so we grounded the genset(no power at the track) and grounded the decoder which eliminated almost all the noise and it is picking up the cars a lot better now.
jason