I have heard about some models using Craiglist to find a modeling partner. I would definitely exercise caution if you decide to do this and meet them in public first, but a couple of people I know have had success with Craigslist ads.
I would probably stick with sites like this one before I resorted to using Craigslist. I’m still wary of buying everyday items through Craigslist after that whole mess with the “Craigslist killer” a few years back.
There are probably way more available in your area than you think. Checking your local “craigslist” might help you find someone. You may have to go through a few people before you find someone you are compatible with.