Financing an auto loan without a co-signer? I have good credit?

I'm looking for an auto loan. The banks are not an option because they require a minimum amount that is not what I'm looking for. The other private options I looked at were good, but they said I need a co-signer. I have good credit, but not a great income since I work part-time and am a student. Is there some kind of place that will lend me money without a co-signer? Are there any known places I should look at, or where you can direct me? Obviously it will be higher interest, but if it's my only choice I guess it's alright. My only other option is my credit card and it's 11% interest, so I'd rather not.