Try Wildcat Autowrecking in Oregon.

https://www.wildcatmopars.com/

They have a huge inventory of Plymouth cars and parts. You may have to buy complete door panels.

I purchased a 64 2 door Fury to restore and at one time the original door panels were removed and discarded.  I purchased a new Legendary interior set but I still need thr emblem and the stainless steel trim pieces to complete the panels.  Does any have or know know where I can get a set.  I need for both doors.