You should be able to get them at BC Bearing they will be in the phone book for the Lower Mainland. If you tell the counterman what you want you are doing with the bearings they will get you some that suit - they may be available with the same ID and OD but have a different roller spec. for high load, impact applications etc.
FYI
In the past, I have installed a Timken 32006X lower steering stem bearing instead of the OEM unit.
I have tried to locate a generic upper one but the I.D. was too small. I have been told that there is no generic replacement for the upper stem bearing because Honda had the I.D. set at 26 mm. The standard for that bearing number would normally be with a 25 mm I.D.