I have been able to buy most all parts from RaceTech & have my local guy rebuild my vintage RM"s... I have 250"s not 125. Have you been to their site? You could also just send the shock to them, but it will not be cheap...
TF Racing Suspension in Myakka City just outside of Sarasota, FL. He is a master on suspension, been around a long time and could help you tune your stuff.
Talk to Steve, he is a RACETECH dealer, and a FULL FLOATER EXPERT, did 2 shocks for me this year fair price, great service, good guy, and I have great shocks.
http://www.smsuspensionsystems.com/
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