It's one of those collectible magazine series that I spotted whilst Christmas shopping. I'm now trying to weigh up whether to buy the template and cards, knock up my own on Photoshop or wait until the OP6 event where you get given them for taking part.
I'm leaning towards the second and third ideas, although that cheap one on eBay is fairly tempting.
My thinking is that if I can work out the diameter, then I can blow up a photo to make a mock up of the fire arcs. I've posted a question on Board Game Geek.