Don - l’m not sure but l think the rubber mat was in all models. Maybe if Ed is reading this he will let us know where he got his. I think Frank Lamp has one in his car, l will contact him.
Dick
These rubber mats were in ALL 59 Plymouths. Even 57’s and 58’s.
I think Chrysler and Dodge had the same mats. I know DeSoto had different mats
Dick followed the lead provided by Don Mack, and got this reply:
Dick can provide Kris’ email address, but perhaps it’s best if all interested parties express their interest here, and as a group petition Kris to make them. Now, what he should really do, is open an eBay Store for them - he’d get all the orders he can handle, and maybe drive that price down even further.
Dan
Plymouth mats were the same pattern from '57-'59, Dodge had their own version, as did the senior cars, Desoto, and Chrysler.
—John
Our master has spoken 
LMAO, Matthew!!