Try this yard:
Colaws
https://colawrvsalvage.com/product/w...s-parts-stock/
877 548-2125
ULtraRV doesn't even list one.
Try LIchtsinn Motors, a Workhorse dealer, like Brazel's/UltraRV
641 585-3213
Wheel bearings on '05 P32 are:
Inner bearing LM501349-N – inner race LM501310-N - grease seal National 4740
Outer bearing 15103S – inner race 15243 must have 1.0285 ID or too tight to fit
I assume they will be the same on '00, but check to be certain.