Looking around on the Internet, the following places show cardboard trunk sets for the '53 Super 2-door (possibly can be cut down to fit a 4-door?):
www.repops.com (may be the supplier for the others listed)
Another forum user reported this place custom made a good set of panels for his '57 Buick from a sample:
Was going to look up these panels in the Buick parts book printed in 1960. But trunk lining items for '53 and earlier had already been discontinued.
Hope this provides some new information.
What has been, can be again. (Bob Wills, 1942)