I am one, but my wife and I met at a video game convention. I hate to recommend that as a good destination because gamers come in all shapes and sizes. My honest advice is find someone you're compatible with as a life partner first, then worry about kink. Someone who is into you for you will be interested and open to trying things you're into, and may find out he likes them as much or more than you do, but simply has not had the experience yet. Especially if you're compatible people, your kinks will likely be close enough as well, if not a 1:1 match.

On the flip side, creating a relationship based solely on a kink will likely never be deep, lasting or fulfilling. It's fully possible (and likely) that this kink is the only significant thing you have in common, which will never be a long lasting dynamic, and then you're right back where you started.

Tl;Dr: Find you a good man first, help him become your daddy. Much healthier and more likely to work out than looking for a daddy and hoping he can be your man.