Hmm, I have a dodgy stx (not rc) rear mech, I'm thinking if it has the same backplate and that can be fitted to yours (not something I'm familiar with at all) I could give you £3.71 plus post for yours...
Hmmmmm you might be onto sopmething there:-)
Those backplates seem to be the same for that era, STX, STX-RC through to XT. I have just repaired an M739 with the plate from a broken STX mech, checked and its the same for STX-RC too
I did try to swap out a back plate from another mech, but how did you manage to compress the spring with enough twist to get it into possition & then get the C clip back in!!!!!
Specialized Crossroads Comp Hybrid 2005 (being butchered for parts)
Trek Y3 1998, Trek 930 Single Track XC 1997
Saracen Rufftrax 1996
Giant Box Two 1998
Marin Bear Valley 1988
Parkpre Team 925 1994, Parkpre Comp Limited 1994