1985 200m starter dead

[ratherberacin]

hi guys.
have a 85 200m that the gf's boy broke the key off. bought a new ignition (honda) and now no start. battery is good but nothing going to the starter. this is a beater so just want to wire a pushbutton or whatever to get it going.
whats my best- easiest- fastest-cheapest way to going about this?

thanks