I got this for my replacement belt when the X axis broke and it's been working fine since.

https://www.amazon.com/gp/product/B08R93QQ8Z/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I also bought these for the clamp but I cannot recommend them as they're pretty tricky to install for this use. A zip tie or smaller clamp should work for you.

https://www.amazon.com/gp/product/B091CRQG63/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1