I just wanted to round off my question in the thread by detailing how I finally managed to get a hold of a Collector's Edition.

Basically I just asked the question to a UK store linked via the Deep Silver website.
A kind fellow got back to me with some links from sellers on ebay.de and it was as easy as that.

Really beautiful package (the poster looks great in plastic on my wall) though I was mildly paranoid that it might be held back by customs as contraband!