There are plenty of websocket -> socket wrappers around there (like websockify) but is there an opposite available out there? Specifically, I want to be able to connect to a TCP
I'm not entirely clear on what you're asking, but the WebSocket API applies mainly to the client side.
How you code the server-side script and what language you use to do so is entirely up to you. When coding your server-side script, you should be able to choose whether to use a TCP socket or not, etc.