Does anyone know of a source for new/refurbished vacuum pots, the ones that operate all the levers and rods in the climate control? I have a 1970 Plymouth Gold Duster, and a couple of the rubber seals on these things have split, so that I have to do some manual work to get things going. Especially the rod under the very bottom of the heater box, that controls the flap that sends air either through the floor outlet or the A/C outlet. Rather annoying to say the least. Any ideas?