Any place that has trailer parts should be able to fix you up. I would take my old one with you just to make sure. Don't forget to get new mounting bolts for the plate and new wheel seals. I would also get new bearings if it was mine.
WBCCI# 9259 AIR# 38927 TAC-TX 14
Stop Littering-Spay & Neuter-- Adopt From Rescue
He is your friend, your partner, your defender, your dog. You owe it to him to be worthy of such devotion.