Don't buy the Park one with the stupid thick center.

Mine looks like this one. Wearing out is a new one to me. It's the bolt that bends or breaks, LOL.
Only thing that wore out in 15 years is the rubber. I have some PL glue in the middle now, took a week to really harden. It's in my back pocket 99.9% of the time. I have threaded stems and had a hex skewer bike for 15 years as well. All 3 of my DIY stems have two 8 mm bolts.
https://www.amazon.ca/IceToolz-Allen.../dp/B0028NANNQ
There's other's from $4 and up.