Headliner was most definitely parchment. I pulled it out because all the seams had pulled apart and it was hanging down all over the place. I have the sail panels, but they got forgotten outside in the rain so they're pretty useless now.
I'll try the classic catalog again... last night I tried downloading it and for some reason, all the pages were visible except the ones the headliners were on.
I'll also query PUI directly too. I was at Carlisle yesterday and was able to speak in person with the Ames and PY people. Classic doesn't bring any merchandise to the show, just catalogs, so I didn't even bother approaching them.