I just wanted to make this thread as an informative POST to help others.
Last quote from the factory for a idler sprocket was $31.
They don't sell the bearings alone so you are stuck buying a whole new sprocket.
I couldn't find a supplier with a matching stock extended inner race.
So here's what I ordered:
Bearing part # 2780T39 McMaster-Carr
Washer part #3088a512 McMaster-Carr
All you need to do is press the old bearing out, clean the sprocket and press the new bearing in! The washers simply replace the extended inner race so you add one to each side of the sprocket.
There are already five billion washers on the sprocket bolt/axle anyways so what's adding two more going to hurt?