Hi Mojo,
At the time of the review it could be ordered, but I suspect that might no longer be the case...
Two options: the quickest is through Ebay: Ian.Hobday or one of the Japanese stores. Ian has one for sale @ $3199 US, and he regularly sells telephoto and super telephoto lenses on Ebay. That's a pretty good price in Euros.
Cheers,
Marc