They make handheld push button switches that I believe what you are talking about. Example link below. A lot of people use them for push to talk, if that helps

They make handheld push button switches that I believe what you are talking about. Example link below. A lot of people use them for push to talk, if that helps your search. https://www.amazon.com/Hand-Held-Button-Switch-30-825/dp/B00T6RCGNC/ https://www.amazon.com/Hand-Held-Button-Switch-30-825/dp/B00...