Cartridge Bearing Size for Speedplay X2 and X3

[Appkiller]

I called Speedplay and they couldn't tell me the id and od of the bearings for these pedals. I could
have just ordered the bearings from them but my brother works for SKF and I figured he could get me
some nice bearings (ceramic maybe?) gratis.

Anyone know the dimensions of these bearings or perhaps a SKF part #?

TIA

App