You need the fork cap, the large solid washer underneath (non preload adjustable has a hollow washer) and thats all really. You need to cut down your existing inner spacer to make it the same length as before once reassembled, or you can buy the later spacer as well.
Spacer
Parts 19 and 22 (the spacer is 1
which can order from
Robinson's in the UK and recieve in 2-3 days.