Family Friends or loved ones. If none of them can help, hit up the mob. It is hard to get a loan for an older car unless you have something else to put up as collateral. I had a hard time getting a loan a few years back for a truck that was only 5 years old, but it had over 100,000 miles on it. I was trying to get a loan for $10,000 to buy a truck worth $22,000 and it was still hard to do, even with good credit.
If you want to make payments on an older car, you might have to buy one from a shady used car lot that does in house financing