Yeaph those kangas are a b-i-t-c-h when you hit them .... thank god he's alright and luckly it looks like it was a smaller animal. BTW Emu's aren't any better !!!
During my last trip (Birdsville loop) an Emu ran straight across the road between me and my riding buddy while we were riding about 7 meters apart. Very very bloody scary
I doubt whether there will be any second-hand tubes available locally but you never know. Haven't travelled quite that far across Oz so not sure what facilities are like around there - remote motorcycle shops are particularly adept at "making do" but I imagine that that best service will be available further South. Yamaha show dealers available in Carnarvon and Geraldton then there's a BIG gap down to Perth.
The bike doesn't look too good so I hope he is mobile enough to make whatever distance is required.
The joys of the Oz Outback - desolate, rugged and beautiful ... but liable to be really challenging at times !!!