The trunions are the castings that the oleos/gear stubs go into.
The guy I used to get the bits off is no longer in business. He used to make oleos etc. Your second pic is the trunion.
Those switches are dead easy to damage or wipe off as the solder is very soft.
Much as it hurts, you are better off to get new ones. ZYHobby has pretty good prices on them.
https://zyhobby.com/collections/landing-gear-387