DIY Guide: Smartphone VR Headset Plays Oculus Rift Games for $20
DIY Guide: Play PC Games with Your Smartphone VR Viewer
Homemade SteamVR Headset : r/virtualreality
DIY VR/AR Headset - Pi Goggles : r/cyberpunkdiy
Amazon.com: Google Cardboard,Topmaxions 3D VR Virtual Reality DIY VR Headset for 3D Movies and Games Compatible with Android & Apple Up to 6 Inch Easy Setup Machine : Cell Phones & Accessories