Thanks all,
Will check out all of these helpful options and will let you know how it goes. Would consider importing the cables, but if I get the cable measurement wrong then its a costly mistake (would having throttle cables too long be an issue?).
Thanks Mo, was going to swap the brake line to the other side, and know some people have ran the throttle cables on the other side as well but as the bars come back quite far I think I need them to come round the front headstock to keep them in place. Will give it a go anyway, still need the clutch cable though.
There is a place called Melbar cable in Wellington that I will give a go, if not will contact Speedmaster.com to see what they can do
Also thanks for the tip on the electrical connectors the bike uses as this will be useful for internal wiring as will cut down on doing two sets of soldering if I can go straight onto the new connector.