Here's an Amazon link to the bezel: https://www.amazon.com/gp/product/B07DNRVR64/ref=ppx_yo_dt_b_asin_title_o05__o00_s00?ie=UTF8&psc=1
I found it on Amazon. It's a thin peice of metal with 3m adhesive on the back. Its cut and fit are very nice. Just got it today so can't attest to how well it will hold up, but we'll see..
Edit: here it is
Here's the direct link to the bezel guys/gals. Glaxy Watch 46mm & Gear S3 (Frontier/Classic) Aluminium Bezel Ring, Bezel Cover (5type Desgin) Scratch Prevention, Product Protection Effect, Special Design Changes New Galaxy Watch&GearS3_Black https://www.amazon.com/dp/B07DNRVR64/ref=cm_sw_r_cp_apa_7h5ZBb0673B1C