On Ebay, this seller has the rear pillar trim for a Brono 11. If the Bronco 11 and Ranger share the same pieces [?], you might want to contact the seller and see if he has the "A" pillar trim?
https://www.ebay.com/itm/1983-1990-ford-bronco-ii-rear-inner-pillar-panels-blue-LH-RH-OEM-84-85-86-87-8/332402655624?hash=item4d64be0188:g:tQwAAOSwHjFZ1nF2