You can have hubcentric 7mm or less too, when fitted there is enough of the cars own hub exposed to centre the wheel.
I got some on the 'bay a few years ago with the correct e46 centre bore for very little money, no problems mounting wheel centrally.
Anyone interested in getting some new locknuts? RAD are just about the best quality available - they can be also ordered in custom lengths to suit those running spacers.
If you're interested stick your name down.