I bought a hull hugger for my stinkpot. It guess that'd be the closest commercially available item to a fender board. Found out the hard way that it gets hung up on docks that aren't flatBoats don't have bumpers, so why would anyone want a bumper board for their car?
However, in some areas fender boards are useful especially when tying up to docks that do no have a flat surface, such as a pier with corrugated pilings or those silly docks on the Chesapeake where the pilings are outside the dock.
An option we often use is to hang the fenders horizontally. This helps to prevent the fender from rolling around or swinging clear of the piling.
As for horizontal fenders, I've been forewarned that they can up and out in heavy storms. Seems feasible in unprotected marinas