Hi Michael
Try Aussie Decals set number A48044 (I think there is also a A72044 as well). I don't think it's still being produced, and you'll find it hard to track down their suppliers too.
I bought one about 4yrs ago for Tamiya's Lanc, so I know they were recently available, and I reckon I saw one at this year's Model Expo in Melbourne : which means Red Roo Models (in Melbourne) and Aeroworks (Adelaide) are your best bet.
Try:
Gary, Richard, Ed at Red Roo Models, www.redroomodels.com, redroo@redroomodels.com - but they are closed until 10th Jan due to illness
Craig at Aeroworks, aeroworks@iprimus.com.au - the have a shop, (08) 8357 4756, and are on Facebook, but no website
Good luck, let me know if you need more info
Cheers, Matt