This is in for a lost key, and these keys are near impossible to find.
Update: So I'm drilling out the rivets. Found a NOS lock and key set online. Sandblasted the bottom inside and out of the cabinet. Painted the area that I sandblasted with Rust Converter paint. Had a new reverse water decal made (thanks to Ed, my neighbor). Rivets arrived and were inserted. Tested and works as it should.
In search of gum that actually fits this machine...