Speaking honestly, I doubt you will have very many takers wanting to offer a discounted session for their own pleasure. This is a job to us. The majority of providers are not in it for our own physical needs (but I am sure you will find some to chime in that they are here for the sex... I have a tendency to doubt them honestly). Most of us have an SO, whether it is a boyfriend, husband, or in my case, a SIR, that takes care of those needs.
I do get to experience having my own needs met sometimes in my Dominatrix sesssions. The men come to see me to be dominated and making them pleasure me is part of the role-playing expected in that kind of appointment.
However the FBSM that Tori mentioned sounds AWESOME!!!!!!!!!!!