never heard of anything called a shark guard......chain guard yeah....but they don't normally go back all the way to the sprocket.....if it is in fact a chain guard you are looking for...then what specifically are you looking for?....Carbon Fibre?....billet?...or what?...or just something that is a no drill assembly or attachment?
I think it was Graves Motorsports that started calling them Shark Fins. I bought a couple from www.lockhartphillips, had one my Aprilia RS250 race bike. The other was going on my old SS. It mounts below the swingarm in front of the rear sprocket. The though is that if your foot kicks back it won't go into the rear sprocket cutting off your toes. On mine you have to drill and tap the swingarm, never seen any other style for an SS.