What would YOU do?

This saga continues. I received the shipping number for what turned out to be.... a camshaft only. I feel like I got the shaft on about 75% of the order. I spoke to him on the phone about 4 days ago. He sounded surprised I haven't got the other parts yet (yah right) and said that as soon as he gets to his shop, he will find out what's going on. More e-mails to him... nothing. Maybe someone out there can advise me as to how I can start the proceedings to sue him in small claims court in the State of New York. I believe that with the money order going through his business and the e-mails I have from him and me, there is enough of a paper trail to get the rest of my money back.