Dunster, thanks for the link that was fascinating to watch. I love everything Yoko does. She is amazing.
Jacqueck, you can make your own bias strips if you want to, it is really quite easy. I have made them as skinny as 1/10" using heat resistant wire ties or Karen Kay Buckley's Perfect Stems (which are nothing more than heat resistant wire ties!). Any auto parts store and possibly Harbor Freight would have them and for a lot less $ than Karen charges for her set. Here is a link to a you tube video on how she makes them. I don't have any bias strip makers as I find making bias strips is a very easy process.
https://www.youtube.com/watch?v=a4fEFsiEQns