DIY with decorative sheet metal. A better looking return air grill http://www.friendly-home.net/2012/10/a-better-looking-return-air-grille.html
easy update for the home. replacing standard old air vent covers with something more clean and up to date.
New return air vent cover!
Vent Covers Unlimited - CUSTOM METAL REGISTERS AND AIR RETURN GRILLES, Submit the form below for your custom quote (http://www.ventcoversunlimited.com/custom-metal-registers-and-air-return-grilles/)
10 Sneaky Ways to Hide Household Eyesores - Air Vent Cover
158 available sizes of wood return air filter grilles and wood return air vents by woodairgrille.com
The Shockingly Easy Way to Beautify Your Ugly Air Vents | PopSugar
Pretty Return Air Grille - can be painted to match the wall, comes in multiple sizes
“Duh!” Decorating Moments - Emily A. Clark
DIY air return vent cover...love the paneling in this room. Would work in living room...