My gf in the early-2000's had moster labia...and it was sexy as hell. (Picture Jodie Foster's sister with "lips.") It sometimes took finagling to get it past her hanging gates, but once inside...it was the most amazing sight seeing them wrapping around me in any position.
As far as providers with them, I've seen a couple local girls with amazing oversized lips via their showcases, but they haven't been mentioned in this thread, yet. I'll leave that to them.