I have this seamaster 120 ref# 135.037 that needs complete bezel , any idea of possible sourcing this one anywhere, thank you in advance for any input , kazd
Finding an original Bezel on its own is quite uncommon. You will need to keep your eye open on eBay. If you really need one, best bet is to find a trashed "for parts" 1XX.027 and salvage the bezel from it and sell the rest for the parts to recoup the costs.
If you’re trying to make it wearable, I often see replica bezels being sold for these watches. Otherwise, your best bet is to find a beater scrap watch to salvage, but they won’t come cheap..