Annieg just been reading all of this. Last year I had some problems with curtains tracks, Swish no longer exist for Curtain Rails and all their accessories, so any Swish track that is found is really old stock. I eventually found a Swish Austrian Blind rail. Whoever sold it to me via the internet, had wrapped it up extremely well in black sticky tape, but what a mess inside the tape - the plastic packaging around the rail itself was very old and breaking away as I touched it, and the mess I had to clear up afterwards was not much fun I kept on finding little slithers of this old plastic which had turned brown was everywhere and they were very sharp. The track itself was fine.
Swish have moved across to outside boarding etc.
Rufflette also no longer exist, they were taken over by an Austrian company. So again any tape bought now there is a chance that it is not quite the same height as the old tape.