I did a search typing in just "gasket" and came up with a number of threads, including the one that you initiated. Something that you might find useful is to try different terminology. Keywords are everything in a search, and a common term for what you were looking for is "seal" as opposed to "gasket" when it comes to the trunk lid.
Of course there is the possibility that the subject has not been discussed before and therefore does not exist on this forum/website....