For those who have encountered a similar issue, with the felt trim at the windows wearing out due to the glass window sliding onto it, over time. What i did was to get A4 sized felt pieces from most Arts n Craft stores which come with an adhesive built-in on one side. The result is quite satisfactory, albeit not perfect. Below are images to show the before and after. (Before): Image Unavailable, Please Login Just cut the A4 strip as per desired. (After): with and without lighting. Image Unavailable, Please Login Image Unavailable, Please Login Where i'm from, the 2 sides have to be bought together for a whopping $1,700. Hope the $10 solution suffices. This makes much more sense to me , considering even if you replace them with a new set, eventually they will be worn out again. Cheers!