http://www.onlinefabricstore.net/rust-oleum-metallic-spray-silver-.htm
I had used the rustoleum on a separate project where i was expecting chrome but in reality the color was very similar to the factory engine paint most bikes come with...
I later used it to touch up the stator cover on my WR. To my amazement even I couldn't tell where i touched it up...Wow, and then again I tried it on her subframe where the passenger pegs used to be...Perfect match!
The color is right and the paint is cheap, though it is not especially durable so it would probably wear off again shortly.
here is a review I found of some metallic spray paints, and shows what each flavor looks like http://www.skypirate.net/rocketry/con_paint_03.htm