Hey Richard, your just down the road from me in new plymouth (well 300 odd K's, lol)
Re parts, I have a lead on a dead CBR 750 up here, straight bike but had a buggered crank. Been trying for a few weeks to locate a number, address of the guy. Currently sitting in a farm shed under a blue cover from what I'm told. Apparently he tried to sell it locally but i must have missed this some how. Waiting on info from a mate who is currently in England. I was keen to get my hands on it as a project at the time.