Me I would find an piece of headliner from a donor of the same year and model or even a repo liner and have it patched it in by a professional. Your car may even have a piece large enough to do it like under some trim at the rear. Besides it will make a good "character" story when the sun visor is used I would NOT replace 99.99% of an original survivor headliner for a darn little rodent..................I'd spend the time hunting that little $%^&*(* down and.........