You might want to try CJ Pony Service, Part of CJ Pony Parts, Inc. located in Harrisburg, PA. In addition to there very good line or restoration parts and period correct performance stuff ( avail thru CJ Pony Parts) CJ Pony Service is an inhouse shop that does anything from installing anything they sell (on the parts side) to complete restorations. You can reach them at CJPonyParts.com (for parts) or Phone 1-800-888-6473.
I have used them for parts for over 5 years and have found them to be 'Out Standing'