Heh, toolbox coming up.
The above is a mishmash of poly-friendly dating sites, resources for finding various poly communities (both local to you and otherwise), and our own Dating & Friendships subforum (a bulletin board for seeking out individuals near you).
Where do you find poly people?
"As for where to meet poly people, if by some chance you are interested in anything alternative like Renaissance fairs, goth culture, sci-fi conventions, indie music, bdsm, or any small fringe group, you will be more likely to meet people who have at least heard of poly and are accepting of it."
-- SpaceHippieGeek, Polyamorous Percolations
Even if it's not an "alternative" type group, if there's a club or something in your area that does something you're interested in, you can always join that group and it just gives you a way to get out there and meet people. If you meet someone on a platonic level and get to talking about poly, then they can decide how they feel about it without any "pressure to agree." Then if they do decide poly doesn't bother them too much, and some kind of romantic connection subsequently develops, you'll already have "had the poly conversation" with them.
In addition, I know of a number of good threads on PolyPercs (a second poly forum) on the subject. Let me know if you're interested in that additional info as well. I can provide.
They say you always find the romance you're looking for right at the moment when you stop looking for it. So there's something to be said for just being you, and being happy being you. Being out there in "meatspace" where you can meet various people (poly or otherwise) in person of course also helps. But like you said, who knows when, where, and how the dynamic you desire might come together? Just be open to it and prepare yourself through such things as your participation here.
Regards and well wishes,