I recall a discussion awhile back regarding headliner boards and what could be used to duplicate one. One member with a Malibu wagon, if I recall, said he made his own headliner back board using 4mm plastic corrugated sheeting. If he sees this thread, I hope he can elaborate on the method he used to form his. I'm sure a heatgun came into play. The bow system had been mentioned, but my friend is looking for a more original replacement alternative. .