Just get it fixed, you can roll with the "what ifs" all day long. But, what if you got it fixed and never got too close to a curb? The Boxster as small as it is and the parking spaces being designed for huge trucks and Expeditions, I have no problem being in the space and more than a foot away from the curb.
Low cost fix?...It's a Porsche. I don't think it's even proper to use those in the same sentence.