Think I've found the rubber inserts that may work.Found them on Metro Rubber Products website under universal parts Pt# XB11. $30.55 a pair. Going to measure and give it a try.

"Pay attention to the details! It ALWAYS pays off."

1949 Chevrolet 3100 Series 1/2 ton Pickup
1964 Chevrolet C10 (Ol' Yella) (SOLD)
1958 Chevrolet Biscayne 2 door (SOLD)
1970 VW Beetle