Rich,
I never thought of that, but if I can't find what I need I'll bet that a length of aluminum from the hobby shop and a tiny bit in the Dremel would make quick work of it and look sweet . . .
I need the mirror and rod for the MGA since, with the luggage rack and suitcase sometimes on, sometimes off, I need to be able to raise and lower the rear view accordingly. The MGB has a truss rod to secure the windshield mid point which could be used, but the 356 set-up is a little more vintage and closer to what I'm going for with the car.
If nothing turns up, I can always fabricate something that will work and possibly look the part.