www.leftclicks.co.uk have the Lian-Li cases. I searched too for a Plus II version and couldnt find any in Europe. I think Plus II versions didnt reach to Europe yet there are Plus versions.
I have the lian-li V2100, and got it from NewEgg. I looked for the plus series but was never able to find it. The only difference between the plus series and the normal series is the fact that the rear 120mm fan is an exaust fan on the normal case. On the plus series it is an intake fan and above it there is an exaust blower. In the normal series it is a grilled part of the casel. In my case the exausting fan of the normal worked in my favor since it would pull the air out of my horisontal cooler instead of counteracting it.
What do you get with the Plus II compared to plus I?