More Diamond Jubilee designs I've found.
here for £27.96 and other places have it (eg. Majesty magazine).
The next design is being marketed on eBay UK and also through the designer's Etsy site. There doesn't yet seem to be a stitched example: instead, the images look like computer generated ones showing a whiter background and more cream toned background.
The designer's Etsy site is NeverDyingPoet - click here. The Etsy sales are in PDF form, emailed (?the modern version of the transfers sold for coronation samplers?).
If you find Diamond Jubilee samplers I haven't already featured here, please do leave a comment with a link to alert me.