We have purchased this kind of item in the past and believe there is no other way to do so that is as simple and inexpensive as through Appliance Factory Parts.
Switch for: all window models & wn30,hb3
6 position switch for: all window models & wn30,hb30w, m300/400/500 & mmb10
Buy this part and as many parts as you like and pay only $9.99 shipping, within the Contiguous United States.