I ordered this from an Australian Ebay seller who has since given up his Ebay business, but there are still many sellers of aluminium train cases like this online.
If you go to Ebay and type in a search like ‘Aluminium Train Case’ or ‘Aluminium Makeup Case’ you will come up with many other sellers who have great deals on these items.
I’m very happy with mine. I payed around AUD $70 includding shipping, and it fits my whole makeup collection (but I’m not sure where all the new stuff is going to go!). I love that the dividers are adjustable/ removable and everything can be packed away very easily. I’m considering getting another one for my nailpolish, perfume, and false eyelashes!