I have obtained one of these loans before in interest of buying and reselling a car. Though despite your need, the best source is to either check a local credit union that deals with these types of loans or one of the online brokers. I hadn't had much success with the online brokers, but some of them offer the best rates. You can expect to pay about 6% for the loan and you'll need to have a written apprasial or have the owner of the car drive it to any credit union so a form can be filled out. That credit union will then notify yours and cut you check if it the car is in acceptable condition. I've bought two cars before with this process. One from Indiana, and another from Michigan. If you have any questions don't hesitate to ask me.
James