This is the best place I have found for things like Rubber, Window channels, clips, screws, etc. They have a guy or two that can tell you exactly what items are the ones that will fit your car. You can download their catalog at:
http://www.restorationspecialties.com/
I HAVE USED RESTORATION SPECIALTIES FOR YEARS ,THEY SOMETIME HAVE THE HARD TO FIND CLIP OR FASTENER THAT YOU CAN'T FIND . SUPER FINE PEOPLE TO WORK WITH. TOM
I have used these guys all the way here in Australia, and they were just as good from 15,000 odd miles away..
Outcruisen