nicked this off a mate who fits garage doors,pvc doors etc etc for big companies.
it has a nice easy to push feel to it so thought i’d have it he he
think there normally used for disabled people to use to enter/exit building :o

thought ‘push to exit’ was no good so i worked my permanent pen on it and wa’la.new horn button 
You Muppet hahahahahahaha!!! nice one!
Is yours not wired to your stock horn??? I have a switch to either normal horn, train horn or remote control horn or remote control normal horn!!!:D:D
check u out with all ur options lol.
i just have a big greenbutton for my horn.the van need a mayjor overhaul inside.if and when i get arround to doing it ill do something similar to what you have