Wakeboard rack rubber inserts replacements ?

[Scottintexas]

My bulletlines wakeboard rack rubber inserts are broken/ falling out. I tried to gorilla glue them back in but it didn't last.

I can order a new set of 4 but it will cost $30. and I need them for both racks so $60 seems expensive especially to continually replace.

I looked at Mcmaster carr but didn't see anything comparable.

I googled and found someone replace with rope and other with soft tubing.

Just wondering if anyone else has any good ideas.