I have a restorable pair that need some work due to water getting under the mats. Under surface is not rusted, brackets to mount boards to braces are good. Still some trim is in place. eMail barnstuf@comcast.net if interested.
May be I can help I just removed a pair off of my 29 four door I am not positive if they are original my car was restored over 40 years ago if you still are looking I can send you any pic that might help my name is joe my email address is jmaecki@shoreviewelectric.com