I haven't noticed that before, but then I haven't looked there for something like that either.
OTOH, you might be able to create something like this from off-the-shelf materials with some pretty basic tools:
Don't know if they carry stainless steel that bright though. The above undertray was made by an outfit in Germany for the Bandit. One thing I can say is it's a royal PIA to keep it clean and shiny... I'm sure the same can be said for any of the painted plastic ones, too.