I found that nearly all shops here in Holland can at least order the Glenturret. It usually takes a week or so before the bottle arives there then.
Did you know about 80% of the Glenturret gets saled at the distillery shop? I've been there too, it's a very nice distillery, although maybe indeed a li'll touristic. I heard they recently opened a "Famouse Grouse Experience"? (need I say more?