Westcountry watertsports is where I got it from - they may have spare fins but I do not know. Best to have a spare set even though the fins are so much smaller! The thing I have had a grapple with is how easy the Quad is to sail it really does do everything they say it does - it sounds stupid but at first this makes it slightly less exciting as the EVO as it does everything for you - I have got over this after a few good sessions and now I am hoping to push my sailing further and into more difficult manouvers. http://www.wcws.biz/
best to ring them Peter or Rob feel free to mention my name Alex Roads.