What a beautiful floor! You have checked with all the high-end flooring retailers in your nearest town so far? Sometimes getting a person in a store near you to help is the answer when you have run out of leads online.

Those planks look pretty short. It leads me to believe you have short leaf acacia (yes...there are different acacias out there). You will need to go shopping for short leaf acacia. This shouldn't be too hard once you get into the specialized flooring stores (weird to shop for flooring a toilette paper at the same store...). They can find a source or they can get an order in for you. Which means you should be able to gather some extra material so you don't have to go through this again.