Style 259's on E70 options.
 

Just got me a set of Style 259's for the low. What options do I have to mount the rears? I know they can be bored out, but where. I live in Chicago. If anyone knows where, how much? Also, what type of adaptor can I use if I decide not to bore out the wheels?

Having them bored is the best solution. I had to do the same for my rear wheels. I'm in Atlanta, but I found most wheel places know someone who can do it, and also, any good metal machine shop. There should be plenty in and around Chicago. I was quoted about 100-180 from wheel places, and the machine shop quoted me 30 dollars for the pair.

You can use spacers as well, but I am weary of that alternative Plus, the new wheels will stick out plenty without a spacer.
You would need the 74.1 to 72.6 adapter & spacer:

https://www.amazon.com/5x120-Wheel-S.../dp/B00DNND7PG


These guys might be able to help. Just googled wheel shop in Chicago area:

https://www.rimrepaircenter.com/

I use these adapters, along with these bolts. I've run my winter set for 2 winters like this - no issues. I have the m-sport fender flares so even with the 15mm spacer, it doesn't look out-of-place.