Check out Raine. www.raineinc.com
and google on "two-way radio holster" and "two-way radio case" and you will find several manufacturers. Raine radio cases are stocked by some ham vendors and many uniform and military equipment dealers and Raine will sell direct by mail or internet. I use their radio, cellphone and pager cases for various uses. They have a pager case that is just perfect for the batteries for my Icom IC-W32A.
73 de Walt N2IK