ozstick also sell joysticks and buttons. and coin mechs.
iirc they are the same as the ultimarc stuff.
edit: just re-read your post and you said you could get joysticks/buttons - sorry!
Re:monitors, check out jomac.net.au - I got my chassis repaired there when I got a free "dead" monitor with an empty cab. But they are in perth so shipping to nz may be an issue.