As far as I know, for fretless Dingwalls it is now the only fingerboard option.
I believe this is the source of it, though they call it Obsidian Ebony
Obsidian Ebony by ThermalWood Canada — a real wood, jet black ebony alternative developed over five years and tested by Fender, Martin, and luthiers worldwide.
thermalwoodcanada.com
Guessing they named it that as it's an ebony replacement, and likely some branding/side-stepping of stigmas and preconceived notions of what maple "should" look and maybe sound like.