Thank you, she is pretty and quite large compaired to Dusty, I'm thinking Dusty might be a timor Zebra?
And thank you, my friend suggested the name.

Whoa she is only young, as the shop said she is yet to colour up, (we're from Australia too.) No chance of getting info on her parents as she was from a shop and no bands on any of the finches.
I did have a look over some mutations and the isabel caught my eye too.
I'll just have to wait and see
I do now she has some light, tan-ish tail markings showing up, if thats any help...
Thanks again for the replies
