Where can I find this?

blockbuster has it...online at least

well go to torrentspy.com enter tesis and there is a torrent which works just fine. but... you havew to download subtitles from titles.to and edit them. play in bsplayer. or buy it:))

emule men, if you like it, try another spanish movies like the ones of alex de la iglesia or javier fesser...

You can buy this DVD on amazon from about £6 and on ebay too...

It's insanely hard to track down in brick-and-mortar stores. I've been trying for literally years. I ordered once from an Amazon seller, but had to cancel it as they didn't actually have it in stock despite their claims; I just placed an order for it with a different seller (several months later), we'll see how it goes. You could give that a shot as well. I'd recommend doing it sooner and later, it seems it's only getting rarer and more expensive.