You will get zero responses. You are looking for a Unicorn. Not only that, they have to be good looking and you are desperate nc>pa.
Single Bi females have no problem getting partners. One time a woman wanted me to be her hubby's birthday present. I said sure, if you do my hubby first. Her response was priceless. "But I don't know him." Ditto.
It would be easier to rent or swap wives with couples.