I just bought one of the sway bars like the above link shows. It just came yesterday and looks really well built,I paid $139 plus shipping since its powder coated and not the plated one.
I plan to install it on my '37. It shouldn't be much different then the 41-46 or even the 47-54 chassis. I have a original Chevrolet sway bar from a '39, but I think it might be from a car and adapting it looked to be complicated.
I will keep you posted on the instillation. Joe