Comepi
ComepI SP1K19Z11 Safety Interlock Limit Switch EN60947-5-1 AC-15 400V A8372LR
A nice touch is the dual particle size certification on the MOS2 3-4 ยต Fisher (15-30 Microtrac).
Comepi SP2K120W02 Safety Interlock Limit Switch
A nice touch is the rubber base that keeps everything from sliding around.