This might be a bit of a bone question.. I have seen one or two of these Ops vests which differ from the one on issue now. On the right chest they have three grenade pouches and a zipped horizontal pouch rather than the normal utility one, and a load of other less obvious differences. Does anyone know if they were ever on issue, or made by someone else? I might as well cut to the chase, does anyone know where one might obtain one?