Prep school t-shirt

I'm trying to find a particular type of t-shirt that some on this board might remember. It's basically a ringer t-shirt (contrasting neck and body). The neck trim then forms a two or three inch long vertical stripe down the front. Sometimes this vertical stripe is two contrasting colors. From a distance it almost looks like a henley without the buttons. I think these may have been once used as prep school gym shirts. I used to own one, but who knows where it went? Is there a term for these shirts, and more importantly, a source?

I think J Crew made some knockoffs a few years ago.