In reply to Curly Rich:
Make your own plates out of bleach bottle plastic, zip ties and/or coat hanger wire. You can get cold resistant zip ties in Maplins. Make the plates slightly over-size so that they have a wrinkle in them: the wrinkle pops the snow off when you lift your foot. Easy, last for ages. The easiest thing to do is to make a cardboard or plastic template first and keep that safe as a pattern for later.
Bleach is cheap and the bottles come in many colours......