Stew, those switches are hard to come by any more, if at all. The primary way that retrofitting switches into a home wired with aluminum is done is by use of copper pigtails from the switches, and then the aluminum and copper are wire-nutted together. However, this is done with a special type of wire nut which has a grease inside that helps assure good contact.
I would not attempt making this connection without the proper wire nuts, and without a full and complete background in the history and workings of residential aluminum wiring practices. Many homes with aluminum wiring have had serious problems and fires due to improper connections.
Have a licensed electrician take care of this, and if you're not the homeowner, I would make sure the owners are aware it is aluminum wiring.