You’re talking about a pocket pussy/ masturbator with most pocket pussies you will not have the option of hands free thrusting accessories the only one I have seen is by Intimaly. But in the first place why would you need a pocket pussy with a partner there’s better couples’ toys
For Fleshlights and FeelStars there’re a lot of DIY mounts online. Also there’s the liberator mount - but this one is really expensive. Still it works out perfect for us. There’s also a review on toychats about it.