Am I Ebay Illiterate?

Okay .. so following suggestions to search on Ebay .. either I don't know what I'm doing .. or they don't have what I need.

Can someone point me to where I need to go on Ebay to find an Authentic Yankees jersey that I can have a custom name & number stitched on????

Thanks!

I couldn't find any on ebay.
I found This site but they are replicas not authentic.