There is only one place where you might find "like for like" switches.
Northwest RV Supply
in Eugene OR.
They have zillions of products and stuff that is NOT listed on their web site. You need to call and talk to either Joe or Niabi and possibly send them a photo or two.
Otherwise I replaced the push-button on/off switches in the sconce wall lamps with THIS
one from ebay. Works great!
Dr4Film ----- Richard