www.mouser.com I bought one that is adjustable from 2-6 position with 3 sections. Here is one that is 3 Pole 4 position. It is not a stocked item but they will order it and ship it to you. Typically within a couple of weeks or less. http://www.mouser.com/index.cfm?han...uctid=629303&e_categoryid=144&e_pcodeid=61207 Link for your own search http://www.mouser.com/?handler=data...t=*rotary*+*switch*&crc=false&Ns=SField&N=309
Many rotary switches have adjustable stops. So as long as the switch has as many (or more) poles than you need, and there's as many (or more) positions than you need, you can select a switch that they do have in stock. For example, my stereo preamp needed a 2 pole, 7 position switch. They stocked a 2 pole, 3 to 12 position switch...no problem, I set the stop so the switch only goes to 7 positions.
Newark and Digikey also have them (I've posted links before but they seem to expire, so just go to www.newark.com or www.digikey.com and do a search for "rotary switch").