Civie 3Somes - Finding the 3rd

Figure this is the right place for this thread.

A girl I am seeing is interested in her first experience with a girl. And who am I to turn this down?

She's posted an profile on a dating site (not AFF) looking for a Bi Girl (not mentioning 3some). But know that its a longshot.

Anyone have any advice... with the following "ideals"
- the girl is someone she'd like to potentially be friends with (ie: grab a glass of wine occasionally, get nails done, etc)
- we are both above average looking, but not "hot". Looking for similar
- we are late 30s/early 40s (looking for 28-42ish)
- we are both professionals... perfect world we'd find a friend with a college degree
- neither of us are looking to meet a couple... just a girl
- both like bars/drinking (typically in go out in the Uptown, Lakewood, Bishop Arts areas). NO drugs

I know this is very narrowing and picky... making it a longer shot than the average couple.

Thoughts, advice, places