as of now - there are no major companies producing an aluminium wing for an RC car. the reason for this is that the extra weight not onlly bends the lexan body down and makes it look silly, but it throws off the cars balance and negativly affects the handling. You can try using spastix chrome paint on the plastic wings as it is extremely realistic. also - check out some of the bodies from proline, such as the opel vectra body, as it has the heavy duty mounting stems that can be used to support a small home made aluminium wing.