Dynaroll claims to have one. I say claims, because it's an FR-8 bearing but the website doesn't match up with the catalog I have hear in front of me, nor does it match with standard FR-8 bearings at other places. At any rate, it's worth follwing up on.
Dynaroll FR-8
It's an open bearing. The sheilded bearing has a 5/16 overall width. So do the FR-8 bearings at other places like
Consolitdated Bearings
Best I can do. I used some FR-8s in our tranny last year and got them from consolidated through a local company called Ranger Conveying that deals in gears, bearings, shafting, etc.