To widen your search, '79-81 grilles will be the same.
You can click "search" at top of the forum...then click "advanced search"...type your keywords in the "search for" box...in lower left of field, UNcheck "check all"...then click "Choose a board to search in, or search all"......just check the section you want...this will allow you to search that particular section only (like "parts for sale").. and click "search" in lower right of field
Hope this helps