Acerbis do (or certainly used to do) a 'universal' low front fender, for about �30 as I recall...
I had one on my XR650R rally bike:
You might have to jiggle a bit (with spacers etc.) to get it to fit the existing Tenere fork brackets, although it also comes with clamps to fit around conventional forks that don't have cast brackets like the Tenere does...
They come in black or white (and can be painted), and you can also cut it down a bit if you want to adjust the shape (I shortened the back overhang after the rally):
Jx