Take a wheel bearing to NAPA or something like that. They will measure it and hook you up.
No matter what the service, no matter how hard I try, no matter what I do, my trailer is about 1000lb over claimed according to the new sticker WW sent me, and useless for its original intent.
Of course they're stoked to sell parts. What good would it do them to let them sit on the shelves and lose money? I'd be service oriented too if I had any in my garage. Are they even WW parts or are they for Dometic...?