I’m trying to find what this flower plant is called and can we get this in Australia?

From the photo provided this looks like a type of Celosia Intenz.  There are many varieties available in Australia.  

Visit your local nursery to check availability this summer.

When you plant your new plants the garden, apply 'Yates Thrive Roses & Flowers Natural Fish & Seaweed+ Concentrate' as a complete fertiliser to assist with healthy growth and prolific, beautiful flowers. Click here for more info on this product: https://www.yates.com.au/product/garden-fertilisers/organic-based/yates-thrive-natural-roses-flowers-concentrate