help/64 cuda automatic

ok two new questions, Has anyone experienced rippling in the big back window rubber on the inside up at the top where it starts to curve down (by the dome lights) ? I had a local glass company replace it a few years ago and have never been happy with this, now that I am doing a total resto I wonder if I buy a new one will have the same problem. Or is one mfg. making them all. Second- Can one just buy the antenna mast ? My chrome pcs are nice hate to buy new ones. I don't think the mast separates from the wire , is this true as well ?