Originally Posted by rowiebowie
Weather Guard makes wire window inserts. Probably intended for workmen's van.
Neat product, but fixed in place. Not versatile.
I appreciate the OP's question because this is a subject that I have attempted to research in detail. Anecdotally, if the bad guys know that it is NOT a contractor van, they seem to break out the driver's window preferentially. One could attach a fixed wire guard to that window, but then it becomes a daily pain because every act of trash-throwing (into a receptacle), ticket-taking, drive-thru food receiving, toll-paying in jurisdictions that do not honor the two most common national transponders, mirror-wiping, etc.... all that stuff requires opening the door and maybe even stepping out, because the window is blocked. So it's not ideal.
Historical example chosen at random from my photo archive: