Also measure the inside diameter of your carbon forks as I found out not all forks are made equal & not all bungs are the same.
I've got a shim you can have for postage but your local bike shop might give you one of these as they generally came free with stems anyway.
1" aheadsets can be bought on ebay for not very much
I've used these Tange ones before, they were fitted as standard on Ridgeback Genesis bikes. Bargain if you ask me http://www.ebay.co.uk/itm/BANKRUPT-BIKE-DIA-COMPE-HEADSET-1-AHEAD-FORKS-BLK-/170609664873?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item27b920e369
Also measure the inside diameter of your carbon forks as I found out not all forks are made equal & not all bungs are the same.
I've got a shim you can have for postage but your local bike shop might give you one of these as they generally came free with stems anyway.