No one at this time imports the Australia 250 2V or the Argentine 221 SP head.
Every now and then one comes up on eBay in the US.
Australia eBay has one more often on its' site, but sellers are hesitant to ship to the US; plus shipping is $$$$$$.
I'm having a header (extractor) shipped from Australia by ship for almost $200! So, unless you can find someone
who will add a head to their shipping container, it would be very expensive to ship.
A good thing about the 250 2V head is that it uses the same header as the US 200 or 250.