I don't think they do jersey replicas in a t-shirt format.
A few years ago, you migh have been able to get t-shirt with the logo on the front with the number and name on the back.
It looks like you can get the same type of thing for Cowboys stuff, but the names are players that are retired.
Example,
http://www.nflshop.com/product/index...entPage=family.
Good luck!