In reply to craigloon:
A few weeks ago I got a spare part from the UK Dynafit importer, Anatom. However I now can't find their website... The emails from them listed the address as www.anatom.co.uk, but this now forwards to anatomfootwear instead - confused! Either way, if Anatom are still the importer for Dynafit (they were 3 weeks ago!) then they were extremely helpful in resolving my issue.