This has been brought up in a couple other threads but I am starting a new one devoted exclusively to this bottom bracket because I have some new information. That way, if someone does a search for this, they can hopefully quickly find their solution.

Enduro USED to offer a nice replacement bearing kit for this bottom bracket - - that gets rid of that aweful plastic 'top hat' dust seal/spindle interface. I say 'used to' because, although they still have a Mega-EXO kit, it is for the late-model 24mm spindle Mega-EXO bottom brackets only. They no longer have the ones for the older 19mm-spindle Mega-EXO BBs.

In my search for a 19x32x7 (replacing the stock 20x32x7) cartridge bearing, I found one originally designed for the steering shaft of a Porsche 928, of all things. Better still, Auto Atlanta sells them online for a reasonable $14.40/ea. They are supposed to be standard deep-groove cartridge bearings just like the original 6804 2rs but with a 19mm ID instead of 20mm.

I just ordered two and will follow up when I get and install them.