There seems to be some myth that you need a "special" switch of some sort to carry the DCS signal.
I have used regular SPDT and DPDT toggle switches, 12 position rotary switches, and the Atlas 205 4 pole A-B switches with good success with DCS, with Rev I TIU's.
I don't think you need to go out of your way. Pick a decent switch from your local electrical jobber, or Digikey or Mouser, and you should be just fine.
Someone asked recently if a knife switch would work with DCS.
I have not tried this, but there is no reason it would not work that I can see.
Rod