Assuming it’s the vinyl rock guard for an Escape, year and model unknown, people sometimes skipped the storage box and got the vinyl guard and later bought the box. Maybe someone has one in storage they would sell you, give you, loan you for a template. Be patient if you can.
I’ve never seen one on a “free tarp” but that doesn’t mean one can’t show up.
Strike while the iron is hot. Live every day as if it were your last and one day you will be right.