Preload adjusters

[wraith]

Dose anybody know who makes preload adjusters for a GSXR1100K 1990 RWU forks?

Had a look at the eblag but all seen to be ever 17mm or 19mm hex type.

I may be missing something here as never looked at them before so the hex type may be right, If so what size do I get the 17mm or 19mm?

Cheers for putting up with the daft questions