Depends, AC or no AC switch? 4 or 5 buttons essentially.

If it's a 5 button one I've successfully retrofitted a 3895790 vacuum switch into my 65 Cuda. The electrical hook ups are a tad different. I think this switch lets you turn the AC on/off in defrost by pulling the defrost button out, which I believe is the difference but it has been a very long time. My write up from last millennia on how I did that is here. http://www.oocities.org/steve.knickerbocker/cuda/cuda.htm

If it's a 4 button unit, those are hard to find. I know one place that rebuilds them, but you seem to not have anything to rebuild.