BMX how-to: Make plastic chain stay guard for 1USD - YouTube
DIY Fatbike 1x1 Chainguard! | Mountain Bike Reviews Forum
DIY homemade chain guide for single ring. | Mountain Bike Reviews Forum
wood chain guard, cg-401
Bike Chain Guide MTB Bike Protector Road Bicycle Mountain Cycle Chain Guide Tensioner with Hollowed Design for Single Disc Sprocket, Front Dial Smooth Driving(Red): Amazon.co.uk: DIY & Tools