You should be able to get similar light traps incl. one-direction air vents at a big DIY or someone specializing in ventilatioon. I found some English-speaking store as well:
http://www.screwfix.com/app/sfd/cat/...35279&id=16195
pinkchick Reviewed by pinkchick on . 1st ScrOG plans, feedback appreciated What started as a swell idea last week is now being put into practice.... Since I moved away from the Netherlands, I've been annoyed that I have difficulty getting any decent quality grass, or anything at all, especially if I want to avoid the criminal crowd. Now a friend of mine wants to try MaryJane for her Morbus Crohn, a chronic bowel disease, and I figured "How difficult can it be to grow stuff myself?" Okay, after a week on this and other forums, I realized it ain't that easy or Rating: 5