I've been using a plugin called Restem on BIAB drums that don't have stems available. It's made specifically split drum stems. You play your song in real time while ReStem does it's thing. After it identifies the stems you can use it as a mixer or you can export a midi file. There are a bunch of advanced features. I recommend it highly. I don't remember. I think I paid $299 for it. It's worth it.