Got the specs on the old bearings? Bearings are UNIVERSAL, WORLDWIDE.
That said, get one of these 4 things off of the bearing:
A 10 digit ISO number
A number like 37X145
EXACT dimentions of the inner race, outer race, and thickness.
A complete bearing, or the races
Once you get those things, open the phone book to Bearings, Suppliers.
Find a good local BEaring house, call them and ask them "how much for 2 sealed bearings in this dimention (state one of the 4 things above), or walk in, drop old bearing on the counter, and say "How much for 2 of these?"
Once I discovered that bearings are standardized, I saved MASSIVE money, AND got better products.