There is a cased example currently for sale in the UK on the J.C. Militaria website
http://www.jcmilitaria.com/air_weapons_pistols.asp
It is on page 1 of their air pistols list, and is incorrectly labelled as a "Cased, Post 1969 Hy-Score Arms Corporation U.S.A, Model 802".
They do ship worldwide, but there are two snags. First, the price is extortionate, probably £200 more than its worth, and secondly, it comes with a silencer so you would have to ask for it to be left behind, and I doubt they would give a discount for doing so!
In my opinion though, this British version of the Hyscore is no better in quality than the original US version.