I am posting in the Roo Section - but this mod will work for other models as well. High on the mod list for my wife was blinds for our 21SS instead of the supplied curtains. After pricing "Custom" sized accordion cordless blinds (Expensive!) I made a trip to the local Lowes home center. I found stock Allen & Roth brand off the shelf accordian blinds that serve the purpose perfectly. Our store stocks off white and a cappucino color. We went with the cappucino color for our "Westport" interior. The 23" and 39" width work perfectly inside the standard valances with no modifications. I did our entire slide (4 blinds) for $140. These are light filtering however - not light blocking. All the hardware/casings are pastic and lightweight. I added ¾" felt pads to the backs so the won't "Clang" on the window frames.