Heater Control Knobs and Levers

[ABX131]

My 63' truck has all the heater control knobs missing, it looks like the tabs have snapped off the levers. I have been looking around, mostly on Ebay until I actually get some catalogs to look through, and can't seem to find these replacement units. The knobs are cheap but the arms are hard to find. Saw one guy selling a hole unit with a starting price of $150...Options here? Are the readilly available and inexpensive? Has anyone tried to fab their own? They look fairly easy to make if you used the old ones as patterns..