Take a look in Home Depot,Lowe's and the like. Thry carry carpenters/contractors bags that are somewhat large and most are on wheels with retractable handle.
They usually have a couple of large compartments and a bunch of smaller ones. Built sturdy and not overly priced.
My suggestion is . . . get a BIG bag. You will always fill it. Mine stays loaded for rifle,pistol,and shotgun. --- SAWMAN