Roof Skid Rail Gaskets Needed for 86 Caprice

Hello everyone!

I've been a longtime wagon fan and currently have two, a 94 Buick Century and a 86 Chevy Caprice. I also have a 90 Vanagon Westfalia, even if it's not quite a wagon.

I'm currently having the 86 repainted, and the gaskets under the roof skid rails have fallen apart. See attached pic:



Part numbers are

outer rail gasket is # 20007934
inner rail gasket is # 20007933
center rail gasket is # 01718870

Obviously these are discontinued. Any ideas of where to get them or what to use instead?