I finally found it!

I found this title with english subtitles available from http://www.ebay.com/itm/Pribehy-Obycejneho-Silenstvi-Wrong-Side-Up-DVD-2005-ENGLISH-SUBTITLES-/141509980702?hash=item20f2a6f21e


this dvd is also available from czechmovie.com
There is one benefit now – one that can save you a chunk of cash. At the
czechmovie.com, you can buy any film at a 15% discount with the discount code FREE15!
http://czechmovie.com/d/pribehy-obycejneho-silenstvi-wrong-side-up-dvd-1000093/