Air 360 Air Vent Covers Wall AC Grille – Premium 20 x 6 Inch Register Vent Cover – Durable Rustproof Aluminum Wall Vent – Multi-Shutter Damper – Individually Adjustable Front Blades, White - Amazon.com
Rectangular Vent Grill, Fits 2-3/8'' x 8-5/8'' Opening - Rockler
Aluminum Air Vent Grill 18-7/8x3-1/8 inch - Black - Furnica
Architectural Grille AG20 Series 4 in. x 36 in. Solid Aluminum Fixed Bar Supply/Return Air Vent Grille, White-Gloss 200043603 - The Home Depot
GT Grille Mesh1 4"x8" - Air Vent Grilles - Mockett