Aaron,
Why not just buy 1 can, and have your paint shop match the colour?
BTW, I checked with Ecklers, 1 can of rally wheel paint costs 6.95$ US. Not too bad. I've paid 15$ for a can of "Cast Blast" cast iron coloured paint. The price tripled for it overnight. Looks pretty sharp on pices of the car that weren't supposed to be painted.
Pieter