Although Jeff isn't set up to repair vacuum retard units he can repair advance units. He may have one for sale also. He can also re-curve the advance on your distributor to improve a stock engine or adjust for various performance modifications to the engine. He has always been helpful to me was willing to answer my question. You get his e-mail address from the website and also his telephone number. His shop is in Minnesota, central time zone I think. I don't own stock or anything, but I've been very pleased with his on two Lucas distributors he restored for me and the price was very reasonable.