I was wondering if you couldn't get the bolts out since they are bent, but as far as bolts go for replacing, if I couldn't find them at a hardware store close to home (one's that I thought were adequate), then I'd go to the Ford dealer, or maybe NAPA and pick up a few.
My thoughts are that if you get them at a hardware store, and if the bolts run through the bushings (I can't visualize the actual detail at the moment) just make sure the smooth part of the bolt's shaft is continuous through the bushing; the threads should not contact the insides of the bushings otherwise they'd get abnormal wear