so l found a replacement
the bearing is marked 6205 RSR not 2RS, 6205 2RS is a single ball bearing in the wheel but the one in the sprocket carrier is a double ball bearing but it has the same # 6205 but marked with RSR.
the bearing house said this should be # 5205 2RS which was $33 dollars including UPS shipping to my door tomorrow
l will have to keep my eye on it and see how it lasts
Purchased from BDI part # EBC 5205 2RS