Fulcrum lock ring to suit 11T sprocket

[will911]

Modern stuff. need above to suit an 11T cog , changed ratios and the old one is for 12 and up.. this is for shimano but freehub inner thread is sized for campag, so needs campag type or fulcrums own, shimano lock rings of which i have maybe 20 are too big a diameter...by pm please .. will