Caliper bolts for 97 4x4 v8 dakota HELP!!?

i have this Dakota 4x4 with the 5.2 and noticed some noise coming from the driver side front wheel so i removed the wheel and saw one caliper bolt (pin) was missing (bottom one) so went to auto part store and bought 2 new ones but for some reason the new pin was too small for the hole but fit in the top one perfectly so i then bought an oversized caliper bolt and still was too small (just needed to be a little bigger) does anyone have any suggestions i could try? i recently heard that dakotas were famous for needing oversized bolts as they get older. do they come in different sizes? i really don't wanna replace the knuckle just for these stupid bolts any help is appreciated thank you