yes offset rims or spacers .. I had a similar problem when I fitted 285 tyres about 9 years ago ,,I fitted 30mm spacers and never had a problem since .. adjusting stops are ok but this does reduce your turning circle, ( a short term solution) lots of ideas offered on this thread.only you can decide which suits yourself...Theoretically spacers put extra load on the bearings but as i say I never had any issues for the last nine years, and the extra track does give a slight advantage on standard rutted lanes (as with offsets)

You could just leave it alone and not worry too much about the tyre rubbing. It's not like you spend much time on full lock or drive on full lock fast.

Col

I fitted boost alloys to my 110 csw, then adjusted the lock stops.
I found the turning circle was so bad I couldn't live with it. I then fitted 30mm hub centric aluminium spacers (from raptor) problem solved.
Make sure you use hub centric spacers with alloys ( steel wheels locate on wheel nuts). De grease your wheel studs, and fit the spacers with medium strength loctite. Do not over tighten nuts on spacers or wheels.