I had the same problem. Bought these and solved that issue. They are also awesome for the dip station if your tower has it. And good for increasing grip strength for bouldering etc. I'm sure theyre available other than amz, just an idea to avoid having to replace the tower.

https://www.amazon.com/gp/product/B01ICQJPDG/ref=ppx\_yo\_dt\_b\_search\_asin\_title?ie=UTF8&th=1