Well I cant help you with the blue part of the chain request, i hope your joking about that, but i can point out one of the toughest chains in 520 on the market. It was recomended to me by some guys that race 1000cc super bikes, they run RK GXW 520. My brother rides a KTM 360 SX and was having all sorts of problems trying to keep chains on that thing ( mostly snaping and stretching to quick ) so I got him an RK GXW 520 back in 2002 and its still on it and still in good cond. One of these chains will see you around Australia possibly a couple of times. They are expensive, but they are top shelf stuff.