If I were a rural carrier and had to provide my own vehicle, I'd buy a right-hand-drive Jeep Grand Cherokee. To hell with that half-assed jury-rigging crap.
Had a friend in High School who's driver side window wouldnt roll down... He used to back thru the drive thru's in town. Local police stopped him once and gave him a warnaing that that was not safe and he would be cited for reckless driving if he continued. (After that he just went inside...)