I honestly don't I'm afraid but I can see if I can dig something up.
The best advice I can give personally:
I played Neverwinter Nights for several years on a roleplay server, before moving onto WoW. This scene was wrote after interactions between my character and three others.
Whenever I wrote roleplay stories to flesh out my characters, they'd be to explain developments which happen outside the 'actual' roleplay. To give backstory etc.
Apart from that, I can only recommend for you to get into a character when roleplaying. Then try to get into that very same character, when you write a story away from the roleplay.
I've never tried pen and paper roleplaying or anything. *shrugs*
Anyways, my favourite was always a blood thirsty barbarian from Icewind Dale to write about. I always had a good giggle with some of the things he'd do and say.
I hope this helps anyway. You don't really need to form a backstory before starting to roleplay either in my view. So basically, just get a feel for the character's interactions with others and that should help with writing. I nearly always made up history etc. on the spot.
Edit: Actually, there's really nothing different in writing a scene/story for a roleplay character, than writing one that isn't for roleplay purposes. What I do say though, is research the background of the setting you're roleplaying in.