Q45/Z32 rear Wheel bearings........

[2jz240sxer]

I am having alot of trouble finding a replacment bearing for my Q45 rear diff setup in my S13.......I have a bad bearing and no one seems to make a replacment bearing for it in the aftermarket. Timken list a 511011 bearing for the 90-96 Q45 but I got on and it's the wrong size. Soo....I have a spare hub from the Q45 and I was thinking of having turning it down to fit into the smaller bearing only problem with that is that may make the hub where the axle goes through weak. My other options are Junkyards (Not having much luck) or getting a new hub from Nissan/infinity. So does anyone know of an aftermarket source for the Q45/z32TT?