They are closed for the weekend. I'm anticipating that the part will be impossible to find, so I'm asking advice for other possible providers.
What's the case number?
What did Omega say when you contacted them?
Spoke with them today. I have to send it to the Swatch Group Service Center in NJ. After they assess it, the cost will be somewhere between $200 and $300. Hopefully they have the part.
I think you should keep looking for the bezel that popped off. That might be easier than finding a replacement. Take your time, these things often show up after a while.
Stainless steel, they might just make one. But I suspect they used the same bezel on many different watches, so let's hope that's true in your case!