Amazon.com: Keego 100% Blackout PVC Light Blockers for Window Shades and Blinds - Block Light Along The Sides of Blackout Blinds Great for Bedroom Nursery, Light Blocking Strips (Silvery Grey, 58.5", 2pcs) :
Roller Blind Cassettes + Side Channels. - dollar curtains + blinds
Blackout Roller Shades With Side Channels Ontario, Canada