Wiper Switch Problem
 

I have a single speed switch on my 1965 mustang. It recently broke, and I'd like to replace it.

No one really carries this part, but I've found a few NOS parts on ebay and there is 1 vendor who offers these new. The majority however are for 2-speed switches. The difference between the two is that my switch has 5 terminals, while the 2 speed switch has seven wire terminals. Does anyone know if I can use one of these 2 speed switches and just not plug anything on the other two terminals?