We have an ABI Nightstar 1989 with casette type blinds on the windows. These blinds pull down and clip to the fly screen. However a number of the clips are now breaking. They are the type that you pinch together at either end to release and I am just wondering if anyone knows where I can obtain replacements from or something that can totally replace the clips without having to replace the blind itself. The clips appear to be riveted to the actual blind itself. Thanks for any help.