New member, life long owner 2003 Tacoma sidestep

Hello all!!!! New to the page (sort of, have always come here to look for advice as a non member) I have a possibly stupid question. I have a limited edition 2003 stepside (side step?) prerunner Tacoma. I’m replacing my rear bumper and will need new bumper end caps. My caps are larger than average to line up with fender because of it behind a stepside. Question…are end caps universal as far as bolts and assembly holes? Toyota has discontinued my original bumper so I’m going with a standard first generation bumper without end caps. But I need to buy large end caps or it’s gonna look real dumb. Help would be appreciated greatly. Thanks so much, Becky.