You need to sure that the wire nuts are suitable for AL/CU wiring.
Aside from that nothing special. I don't know what prices are like in
your area, but plugs and switches here for aluminum are ridiculous, but
you can splice in new copper only switches and plugs using a copper
pigtail and above menteioned wire nuts. I've redone the entire house
this way on advice of relatives who are electricians and things are
better now, no need to run around the house annually tightening loose
connections and much less risk of fire.