In reply to craigloon:
Think Dynafit are owned by Salewa, so Wild Country (also owned by Salewa) would be the people to speak to. As they import the stuff now.
Have generally found any good ski touring shop will stock a few spares for the boots they stock. Certainly Mountain Spirit in Aviemore have always been pretty good when I've had bits drop off or break on my boots or Snell's in Chamonix