Thats why BMW was the first to spring to my mind. Think the best bet would be to go to a local scrappy with a tape measure.
I dont think you'd gain owt in tyre width tho tbh....imo thats limited by the actual body and I dont think you get massive gains over 245 anyhows...go to far and you'll over shod it. Its the actual camber angle change that needs addressing more than tyre width.