On my PV the only thing that was left of the radiator blind was the pull up frame and a little piece of chain. I cut a cargo area cover from a Bronco II down to the right size(sturdier than the household window shades) and used that. My biggest problem was finding a chain thin enough to go through the tube through the fire wall, which is tighter than the one atop the radiator. So, I used a chain I found in a hardware store most of the way and spliced the piece that was still attached to the pull up frame to that for the portion that needed to go through the fire wall.
Bob S.