Fiamma® 98655-014 OEM F45i Left Hand Outer End Cap - Polar White
Like it says, it snapped right on, snugly, with no provision for a screw or rivet. But watch out, there are two "sizes" of the F45i awning, regular F45i and F45iL, the latter being a tiny bit larger overall. Also, there are ones with the crank on the left or the right end. It is easy to get the "L" for the Left Crank (also for Left End Cap, crank end or not) mixed up with the "L" for Large. (The awning length is not a factor, fortunately.) So, there are 4 choices possible, 3 of them wrong - order carefully.
Popped right on easily, though directions might have been helpful to remove old ones, which were riveted on. These do not have a place for a rivet or screw. They just pop on.