I've never heard of this company so do your own research before ordering, they seem to be in the US, have stock, and "claim" they can get it to Aus by the end of the month:
They have a banner saying this:
Attention AU - We are aware and are prioritizing your orders.
Historical tracking indicates the latest date to order is 6/23 so orders can ship 6/24 and clear customs by 6/29-6/30.
Delosi® Labs
I just checked their prices, 1L of 100mg is $76us, and $90us shipping to Tassie, so about $240aus...
Shipping for 2L was $100usd, so about $363aus total delivered for 2L...