I have the kick panels that are new, cut from an original kick panel template. You will need to cut out the vent hole and have them recovered in your favorite carpet. 20.00 each. I also have 1 vent cover. email me at firstname.lastname@example.org
These people have parts from a 63 Fleetwood, and they have the vent covers. Amazingly enough, a Fleetwood series 60 without the AC option.
Just type is 1963 fleetwood in the search and look for the vents.