After market is the only option really at the moment ...
That said a BJ4WE shell fits the FS chassis reasonably well (was using one whilst I was waiting for mine to be painted because I had it around) so maybe, just maybe as I haven't tried it, the BJ4WE undertray would do the trick. Worth offering one up to see I'd say.
Cleaning the cars .. what a novel idea, if there are any clean parts on my cars it's because I've had to replace them ... with the Kyosho reliability there aren't many new bits to fit
