Ow Zunkus, kifinti?
You can buy taper roller steering head bearings as a complete set for the bike, this includes the inner and outer parts of both the top and bottom bearings. It's always adviseable to replace the lot when you do them.
Try here:
http://www.mandp.co.uk/productInfo.aspx?catRef=508447
Wave to my family on Rue D'Argens, Msida when you next ride up there.
Chow jbien