A kit of all the yarn necessary to make the mouse wreath plus the pattern and beads is available at PlanetPenny.co.uk for £15.00 plus shipping.
http://planetpenny.co.uk/rainbow-mouse-kit/

The Pattern can be bought separately for £2.00 on Folksy.
http://folksy.com/items/3310946-Rainbow-Mouse-Pattern

Yarn and Patterns now available on Etsy: https://www.etsy.com/shop/PlanetPennyUK