I have a '73 RR that I am tearing the interior out of. The Sail panels (hard plastic interior trim at the rear quarter windows) came out in chunks. No re-pops that I have been able to find and good used ones seem quite rare. Year One and Legendary offer cloth covered cardboard replacements and I have been told that this style was used stock on 71-2 cars. Can any one confirm this? Has any one done this conversion on the 73-4 cars?