Tom wrote -
>>>>now I need a replacement English lockring for the drive side.
That's right, a left-hand threaded OMAS alloy
lockring.<<<<
Tom -
The EDCO competition BBs used the same arrangement, and I suspect (but don't know for sure) that an EDCO lockring might also work with your OMAS BB. They might be a little easier to find than an OMAS one. I have several EDCO BBs (sorry, no extra right-side lockring), if you want to get together to check the fit. If the EDCO works, it might at least give you more options in your search.
Wayne Bingham
FC VA