Just get them from a bearing retailer. They'll be cheaper than from a motorcycle parts supplier and probably higher quality too.

Sizes/options:

Upper: I/D 25mm x O/D 47mm x W 15mm (SKF 32005XQ) (Koyo 32005X or JR) (Timken 52005X) (FAG 52005X)

Lower: I/D 30mm x O/D 55mm x W 17mm (SKF 32006XQ) (Koyo 32006X or JR) (Timken 52006X) (FAG 52006X)

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