this really is a great question
it took me quite a bit or research and phone calls ( and I am near a big city ( between DC and Baltimore)
Many will do PFM training (Kegels+) However as noted most are familiar with women ( not a super big deal) I wanted someone with experience with males and post prostectomy. I finally found someone. This woman trained out of state and ended up with some specialization with exactly what I wanted. she was very very helpful and I feel like I would not have gotten the same results with someone else.
I made tons of phone calls and asked if the person had experience with males and post protatectomy.

You could try calling some big urologists like those associated with a teaching hospital in your area. even if you are not a patient many times the urology department has a few referrals. I did this a few times and found they were very helpful ( for example GW and Georgetown dept of urology)