I'd give those a shot but I haven't seen anywhere that sells them for classic Mopars. Heard they were available once upon a time but not since I've had my Duster the past 12 years or so.
Kind of funny I checked CarID again just for the heck of it and the Sachs 030 816 are back in stock, just ordered a pair! @flingdingo I did a quick web search on your part number for the rears but nothing came up...
