how are you making the plate? Laser limits your options. You either get 1.5ish mm thick, or you get switches that are forced in without locking.
If you CNC router the plates, you have a lot more freedom. You can use plates up to 6mm and just mill a little ledge for the switch to lock onto.
Example aluminium integrated plate housing for my CNC control panel.
All the bike stores are going bankrupt, so you wont be able to soon anyway :x
Brexit is the biggest own goal I have ever seen by a country.