Happy to chime in here. If you are willing to run some camber, then the ARC-8 17x8.5" ET40 with 245/40-17 tires can definitely work. We've had quite a few 1 series customers run this fitment with a lot of success. You mentioned you are running -2 degree's of camber, which may be just enough, however, it will depend on your ride height and tire brand/compound
If you are looking for a more bolt-on fitment we do offer our 18" ARC-8 and EC-7 wheels in a 1 series fitment:
18" Square:
F&R: 18x8.5' ET45 - 235/40-18 or 245/35-18 (245 will require a 5mm spacer to clear suspension, and some negative camber dialed in)
18" Staggered:
F: 18x8.5" ET45 - 235/40-18
R: 18x9.5" ET58 - 265/35-18
We do have a comprehensive fitment guide written up as well that you can check out
here. If you want to dive into further detail about the best fitment for your car, feel free to PM us or give us a call
-Matt