For sale is a set of 3 awning brackets from Westcott Designs.
They're designed for Westcott's roof racks, but I suspect they'll also work on other brands of rack that use 2" x 1" extruded aluminum T-slot rails like Prinsu, Victory 4x4, Rago, or Sherpa Equipment.
These are super sturdy and reversible for left- or right-sided use. I used them on my 2022 Toyota 4Runner for about a year before switching to a heavy 270-degree awning that required proprietary brackets.
Westcott sells them new for $90 each. I'm asking $80 for all three.