At my meetings, which are fairly large, they ask who is willing to be a sponsor, and they stand up so you can see them.
But I actually found my sponsor through a woman I befriended at one of the meetings who is working a great program. She prayed on it, and she said that HER sponsor kept popping into her head. So she introduced us, and the woman agreed to sponsor me. It has been a wonderful relationship so far. So just kind of keep putting it out there to people you feel comfortable with at meetings, and I'm sure you will be connected.