Well, I don't know exactly what stands Janne Warman uses for his set-up, but I've set up something almost identical for myself...Here is what I use:
-Proel SPL250 Keyboard Stand...it's a double-braced "X" style stand, but I guess it doesn't really matter which one you get...but do make sure that you use a double-braced stand...I first tried with a single-braced "X" style stand and the keyboard wobbled around too much when I played on it.
-On Stage Universal 2nd Tier....this is an attachment that you hook up to your double-braced "X" style stand which allows you to angle the keyboard however you want.
Anyway..that's what I use and it gets the same effect...and in case you're curious...both of these items can be purchased at www.americanmusical.com I guess you could probably find them somewhere else also...but that's just where I found them cheapest...
It's just "arms" for a double keybaords that you play "from behind". I don't know the name of mine but it's not important I think. I suggest you to buy a good one, it's about 40 to 50 bucks.