I havent used any of these places but I thought the info might be helpful. I have heard good things about the tachman. A friend of mine has used him more than once over the years and is always pleased with the work. http://www.top20sites.com/Top-Tachometer-Repair-Sites
try these guys Bob. I haven't used them but they are local to me and i also have a console tach I was going to take to them. http://autoinstrumentrepair.com/home
I can do it, you can send it to me, as long as there is no cosmetic work needed. Typical charge is under $50.