The 9600 is/was a USA only combine. None were ever officially sold in Europe. I know there are some in the Russian wheat producing states but I don't know if they were official JD imports or privately imported.
Etienne, it might be worth investigating if the 9660i and 9680i WTS share some parts with the 9600. They look very similar in overall mechanical layout.
It's said that quite a few JD got shipped to Ukraine after the political events in the early ninties. Under some sort of aid program the US send a lot of combines over there.
Nice way to make room for more sales of new machinery in the US. Those might be the 9600's you're talking about.