By ther way he describd it, it sounds older. Some of the older vest model, the rear panel wrapped around to the front anf the front panel was smaller. I suppse the idea was comfort or back protection.
Most modern armor (last5-7 years or so) has gotten away from that and made the patterns more 50/50 to give you equal protection front and back.
Poster above is right, there are quite a few out there will do the job, from 75 dollar import jobs to stout 300 dollar domestic units.
I run a Condor PC from CheaperthanDirt. Works well and has the room to hold sevaral different types of soft armor (includeing plates). I have run older and currently, brand new panels in it with plenty of room. Slides in velcro pockets, go to go.