I'd try Napa. A good one can find just about anything like that. If not I'd just get a new axle. Your time is worth something, and the fuel running around trying to find parts is definetly worth something. Bearings like to fit perfectly so modifying the bearing is a not a good idea. Chances are the spindle can't be removed from the axle, so turning it won't work. I bought a new torque tube axle (1750# gvw) and hubs, and bearing buddies for $160. Torsion suspension is so much nicer than springs for a trailer.