I'm going to do the same, actually. I think I only have a few band fics, but I felt creepy. I love that you're deciding to do that and thinking about the parties involved. I'll read anything you re-write (:
I feel you on this. I've been kind of struggling with how I should handle my own bandfics... I haven't completely decided that I can't continue, but I'm struggling for sure.
I imagine your readers will understand -- especially since you're planning on rewriting your stories as original fiction.
I support your decision to rewrite your stories as orriginal fiction. I think that is a great idea and you might find it easier than you think. Good luck with it!