Dave H - I have started building a Goose replica using a Z1000 A1, it will be ready in the new year. Can help you with info/contacts for getting your hands on a Z, they can be had for less than 5k if you are prepared to look around. Plenty of Z Owners clubs in Australia, I am with the ACT Branch. Most of the bits you need for a replica can be found - maybe sirens and blue lights could be pushing it
a fleet of Goose bikes would be a fantastic sight - especially chasing some Toecutter/Bubba Zanetti reps. !!e-mail me for further info
Dave Q.