Aftermarket Air 69 Dart 340-6pak

Hey guys,
Today I was trying to order an A/C and Heat unit from Classic Auto Air, for my 69 Dart. I am running a 340-6pak and am using the 69 cast iron water pump and a Griffin radiator for a 69 (inlet and outlet on the driver side). I am also using manual steering. They told me they did not offer one for the 69, only 70 and up with the aluminum water pump (difference in length). I don't want to space the pulley out as this will put too much stress on the pump bearing and seal and I do not think it will last or be safe. Does anyone know of a vender or has anyone ever made brackets for the a/c and idler for this combination? All of CAA's other parts will work perfectley, I just need to figure out how to mount it to the engine.
Thanks guys,
Martin