How close are you to Indy? There's an indoor swap meet coming up at the state fairgrounds on the 19th. Might be worth going to, might be able to find replacements. Harmons will be there, and there's several other vendors that handle pre-'72 parts, new and used, that are usually there. You might check with Paul Parlett if you go, I've bough NOS parts from him in the past. Good guy, decent prices and the parts are just as he says they are.