This has been resolved.
Unfortunately he is a student and was busy with school. However, he never notified me he would be busy. I was emailing back and forth on almost a daily basis with him...then the check cleared. After that I only heard from him once a week. He never told me when it had been shipped, or how.
Basically it just comes down to nievity on his part I think. He knew he wasn't ripping me, but didn't make that very clear to me. I was hoping and was pretty sure he wasn't ripping me off, but after he had my money, I'd ask about the part and not get a response. Kinda bad when you're selling stuff over the internet to someone you don't know.