Looking for the stamped sheetmetal reinforcement that is painted body color on 1970 GS attaches on the bottom of the grill.
Got it listed https://www.v8buick.com/index.php?threads/excellent-70-gs-grille-steel.372647/ Also stainless https://www.v8buick.com/index.php?threads/excellent-70-gs-grille-stainless.372646/