I'm not sure why this is such a problem.
Just copy the exact offset from the MK4 rims. Also rim widths too.
I run 255/40 17's in the front, and 275/40 17's in the rear. No fender rubbing.
Just slightly clips the front sway bar, but only on absolute full steering lock, and then it just scrapes the clip on wheel weights. (IF I had them use stick on types, it would not hit I think, or just rub the tire sidewall, and that is no big deal.)
Could be easy to adjust the bump stops so it would not hit, but I've found it's just as easy not to fully turn the wheels when possible.

My only complaint is that the tires track every rut and crack in the road. Next time around, I'm going with 245/40 17's up front, and possibly 285/40's in the rear. (More traction would be a good thing... 315's would be awesome, but that would take spacers to clear the springs/struts, and push the outer sidewall very close to the quarter wheelhouse opening.
Good luck.