Having purchased a black bezel for my PO, and after conferring with our esteemed moderator, watch-man7777, I decided to take the bezel to "The Watchmaker" in Stoneham, MA to do the change. I am very pleased.
The company president, David Kurdzionak, did the change in literally no time at all, and the new bezel even fits tighter than the one installed by Omega. Great work! I also got to speak with David for a few minutes, who advised that like otto frei, he can order Omega OEM parts, too. David is a very nice individual, who certainly knows his business. It's a small shop, and even on an early Saturday morning the place was busy with customers - always a good sign, so do plan accordingly if you are going to stop by. It may even help to call ahead.
(BTW: the replacement bezel was ordered from otto frei, who as well provided exemplary customer service.)
Here's the information should anyone in the Boston Metro area require service:
379 Main Street
Stoneham, MA 02108
They also accept repair work via mail.