The bloke in Wangaratta is Barry Hartnell,
The business name is the Vintage Motorcycle Swap Shop, address, 74 Greta Rd, Wangaratta, 3677. Phon number, (03) 5722 1457. He isn't open on Mondays.
Personally, I find it easier to get new kickstart springs made, particularly if you have the old broken one as a sample.
Best of luck,