[ZX3 in progress]

Ok so I have my car lowered with H&R sport springs (Been on for over a year) and I have some 17" rims with a 215/45/17 tire with a 40 offset. Well when I hit any significant dip/bump in the road my rear tires rub against the fender, if the bump is big enough the front has hit too. Is this bad for the fender/tires? and how could I fix this without getting new tires/rims. I have been told by a few people to have the fenders rolled? I called a few body shops and other shops in K-W and nobody could do this. Anybody know where I can get this done, or if there are any other options? Thanks a lot.