I guess it can't hurt to throw one more idea into the void:
I remember seeing someone mention an idea for a type of portal strap-on that Steele could wear that would allow the user to get fucked at random, presumedly by people at the other end of the portal using a type of portal-onahole. Honestly, it was a stretch in terms of believablity and seemed like it'd be a coding nightmare. I also seeing a hardlight variant on that idea that would at least be more believable and remove pregnancy/fluids from the equation, but personally, I find that being interrupted at random points during an adventure to be really annoying, and if it's something I can turn on and off, or only works while it's being used, then I'm just waiting for scene to happen, which is counterintuitive compared to the rest of the game.
I do, however, like the idea of a hardlight dildo that could take the shape of someone's penis. I think it'd be more interesting if, instead of it functioning like a long-distance gloryhole, it involved the extranet as a new form of camwhoring. The user would strap on the equipment, and either have one-on-one sessions with dick-wielding individuals, or a massive live-stream event that involves lots of users who are randomly selected throughout - kind of like Miscreant Manor, but without the risk of impregnation and more "sci-fi" elements to it.
Perhaps there could be a VR component to it? In which case, it could even be a promotional event at Luca's Lotus Eater that you could access if you've done public VR simulations a certain number of times, though, I'd imagine the live-stream orgy would have to have require a certain level of exhibitionism. Otherwise, I could see it appearing on Zheng-Shi as a stolen prototype, or be an expansion for the Mindwash Visor that you get through a special service. I feel like each of these would require radically different approaches, though. I feel like having it available through the Lotus Eater would be the most sensible option. I suppose an expensive take-home version would still be interesting, though, and you could possibly get it as a reward for your participation during the event?