Outwater Outwater Industries Extruded 90 Degree Aluminum Angle Alu5569-P Polished 1-1/4" X1-1/4" X1/8" Aluminum Angle Moulding 36 Inch Lengths (Pack of 4) at Lowes.com
6061-T6 Aluminum Angle, 4" x 4" x 1/2" x 18 inches - Walmart.com
Outwater Industries Extruded Aluminum 90 Degree Angle Alu149-p Polished 1/4 x 1/2 x 3/64 (.050)-in Thick Aluminum in the Furniture Moulding department at Lowes.com
Everbilt 3/4 in. x 48 in. Aluminum Angle with 1/16 in. Thick 801727 - The Home Depot