Just Google pelvic floor therapist Phoenix, I just did and there's plenty out there. Just know they tend to be busy, between guys with incontinence/ED and women with post pregnancy issues.

What I did first was book with every one that could fit me in, then went back and canceled the ones that were the furthest out. In the end I canceled them all because I lucked into the one I have.

A good therapist will do a very physical exam on you - how you stand, how you sit, how you walk - and then may do a digital exam to actually feel your pelvic floor muscles as you engage and release them. They will also give you exercises to do and show you the proper way to Kegel - there IS an improper way that will hinder your progress.