When I needed a bridge for my recent resto, I went to these people. I happen to live near their retail store, but I am sure if you call them, they will fix you up. I was able to get my 1/2 bridge from them cheaper than I could get it elsewhere. They treated me well, and most of the people working there know banjos.
Did some more digging.
Gold Tone makes an 8" hoop. A few other goodies too.
Bill Rickard of banjo-workshop.com apparently makes them for Bean Blossom. I shot him an email.