That would be a neat thing to have I am sure someone has made one at some time or another, I have wondered about this as well
There may be such a thing, but seeing as how the Mavericks/Comets don't have a facade covering the pillar, I would doubt it.
wouldnt be too difficult to make, find a guage, then the tube to mount it in, then attach to the piller, could be finished and turn out pretty nice. Kinda the same principle as my dash guages.