Here is a post I made on the adventure rider website a few minutes ago
-I'm in Cuzco, 700 miles from Lima (the closest bmw shop that I'm aware of) and the wheel bearings which I replaced in Costa Rica are failing. I am/was on my way to Bolivia and don't wish to return to Lima but my attempt to locate the bearings here today didn't pan out and I don't know what to do. Even if I decide to backtrack there are long desolate stretches between here and Lima which would be awful to break down in. I'm tired, frustrated and in need of help.