He looks to be correct, despite the number of switches we have I can't find one that is 2 wire they are all 4 wire tactile (which up until now is all I had ever seen). However that is simple enough to cure, I just modified a 4 wire (which has an odd pcb footprint) to be two wire with the leads in the center of the body and the pcb foot print spaced .2 inches apart which may not be correct (every other dimension on that web page but not pin spacing nor size Image may be NSFW.
Clik here to view.
) Try this and see if it does what you need.
2wirePushbutton.fzpz (6.3 KB)
Peter
