Cheers for that, I found these in the mean time:

1. FSA Orbit X Sealed Bearing Headset 1" Threadless Silver[/SIZE]

http://www.niagaracycle.com/product_...oducts_id=1772[/SIZE]

2. Cane Creek 100 Series CLASSIC Headset 1" THREDLESS silver

http://www.niagaracycle.com/product_...ucts_id=502863[/SIZE]

not sure where to buy them in the uk though