Two Home Depots, no more brackets. Doh!! I found out that SKU was inactive and they were selling remaining stock. Drats! Isn't that the luck? But, a nice store representative was able to find me some at a third store nearby. Picked up the remaining brackets I needed to ensure I can complete the project.
If you want to get some, better act now. They come in three finishes: white, black and satin finish.
No work completed today. Simply chasing down brackets tonight.