67 window gasket

Dizzdean...Kramer Automotive Specialties in Herman Pa has new gaskets for 120 bucks maybe...also check www.steelerubber.com..I just looked at them on there for our 69 fastback but they're more money. I have my original gaskets but yes, they're covered in 30-40 yrs of goop. Anybody know a good solution to getting them cleaned up or just buy new ones?....Thanks...John