Marko!!! Long time no talk man!! :)
Actually, I bought that note on eBay for a really nice price, so the only way you can get that is through there :(
Yes, I made the 20 pound bill myself using Photoshop :) It was a really daunting task! I even printed out the note and made a watermark and inserted a security thread (using aluminum foil), haha! The things I do! :)