Copying/moving posts from a conversation?

So, occasionally we've had users start a conversation in PMs, then end up wanting to have it be open. At which point, if it had been a thread, I could move posts to a new thread or something. But there's nothing like the post-selection things, nor any thread tools, and so on, on conversations. Is there any way to do this, or are we stuck with quoting, cutting, pasting, etcetera?
I would be fine with a way to move individual posts, or multiquote, or anything like that, but I can't find anything. I guess I can just spend a lot of time writing QUOTE tags and pasting stuff.