Here are some links.
http://bocabearings.com/
http://bocabearings.com/main1.aspx?p=quicksearchbearing
Wheel bearing size is: OD 4 W 1.2 ID 1.5
Rear is: OD 6 W 2.5 ID 2
Hope this helps. I understand buying 1 pack of complete bearings, but I would be much happier recieving a tube full of them!