Of course, there are a lot more links to the places/businesses mentioned.
I only quote those that gave me a permission to do so.
Thank you very much to everyone who contributed.
I am sure you will find all further information via your search engine.
If you discover any broken links please let me know...
Harris Tweed Authority
www.harristweed.org
Learn everything about Harris Tweed
Harris Tweed Hebrides
www.harristweedhebrides.com
Harris Tweed Hebrides homepage and shop
Dots Designs
www.dots-designs.de/raffrollo-selber-naehen/
You can find the instructions - including a video - for my roman blinds here (in German)
Unfortunately, Natasha Marshall closed her website