Yep, 100% Indonesian.

All the WC animals are Indonesian since Australia don't allow the export,
so if you can buy WC Australian it is illegal, so don't buy.

The Australian form isn't easily found 100% pure, since a lot of people mixed them in with the Indonesians.
One of the reasons is people just don't know about it, a L.caerulea is 1 species so why seperate? Something similair with the Red eyed tree frogs,
there is a huge difference in localities, but i rarely come by people knowing it.
A lot of mixing occurs there as well, so you end up with frogs of wich you are unable to tell what is what.
I even saw a breeding pair of wich male and female where the same size

On the other hand, the small amount of Australian caerulea makes it difficult to keep the population healthy and strong, so there had to be chosen, do we just accept any decline by inbreeding, or do we outbreed them with the Indonesian form wich is available enough and still considered as the same species.

In the wild the Indonesians tend to be larger overall, altough there are Australian populations reaching the same sizes as well.
So it isn't that black and white.

The bumps on the head can occur in both variaties more or less.
Altough the Indonesian tend to get overweighted a little easier.
When overweighted they will get layers of fat on the body and head, giving them the dumpy tree frog look.
So when you have an Aussie moving less then a Indonesian, it just might be the other way around with the ridges on the head.
So it isn't all that easy indentifying them by shape, this can be individual and
crossbreeds are quit common as well.

Let's say, chances on a pure Australian green tree frog in perfect health (genetical) are small.