You know what, I had searched for almost exactly this before, but couldn’t find anything like it.
However I wonder: with his/her amount of knowledge, would* it not be so easy to use the same template as the regular editor?
edit: By, “would it not” I mean literally perhaps “should it not” be that easy. If it were that easy, then the plugin would probably not have to re-do it for instance. It’s more of a thought about the core for the sake of enabling the community in this regard.