Cuckolding scenes are a lot of fun, but as missymore stated, often require a creampie ending with the cuckolded one "cleaning up the mess".  I don't offer that as part of my service.  If you can remove that portion of the fantasy, you'd probably find a lot more ladies willing to offer this service.  It may be difficult for ladies to get a male involved as well, and if you want forced-bi to be a part of the experience, then it becomes even more limited.  

Hopefully you find what you're looking for, but realize that finding this professionally is going to be quite difficult.