Help me find a publisher?

I’m in the tail-end of writing a book with the working title: No Cession on the Colonial Project of Gender. While I have had some interest from publishers, I don’t have a publisher. Instead, I’m doing the unthinkable, and something I’ve never done with a piece of writing: I’m writing it on-spec. I’ve done this because of a lingering concern about writing to a brief - even one I’ve set - when that writing is so central to who I am as a person. I was nervous to get it right.

Now, of course, it’s a bit annoying. I’ll have it finished by the year but still don’t have a publisher. All suggestions welcomed. Obviously I have a lot of academic publishers contacting me about this, and while we have our museums book that will entirely fit this, this project is very squarely a book that’s research-informed but aims to reach a broader audience.