1972 duster to "feather trim" 1976 model

They made a lot more 73-76 Dusters than ‘70-‘72. The later cars are easier to find and usually quite a bit less expensive. The feather dusters were a pretty small number, but anything ‘73-76 would look very similar. And anything ‘74+ would be easier to convert to the feather duster options.

You might try looking on Facebook, there are lots of Mopar groups and Marketplace seems to be overtaking Craigslist as a selling platform.
yeah I've recently also tried looking through marketplace but it always gives me no to very few results if I am particular with my search and when I'm broad so it might give me some options it takes a good few hours just to get through a decent amount of 1 search term. Only reason why I would use the 72 is because at first when showing him the ad he though it was his old feather and didn't realize it wasn't until I showed him the identification plate and missing feather emblem.