Widening Track The Correct (But Affordable) Way?

[Superbike81]

My 986 S is a toy, not being kept all original, it's got minor body damage on both rear quarters and some other cosmetic issues. I'm likely going to go wide body with it using rear fender flares and a 996 GT3-R style front end.

I enjoy taking my 986 to the track for lapping days, I'm trying to maintain good suspension geometry while running significantly wider and lower offset wheels.

I've seen control arms from Tarrett and other companies, I've seen axle spacers, and a few other things.

I'm trying to meet somewhere in the middle with maintaining good handling performance without spending $10k relocating suspension mounting points and basically re-engineering everything. What's the most affordable way to increase track width without sacrificing suspension geometry too badly?

Thanks!