Tower Block arrives on DVD and Blu-ray in the UK on February 18th, 2013, according to Amazon, and they are NEVER wrong about anything. You can pre-order now, if you so desire, using them there links in that there previous sentence.
Like CvsZ, due to financial considerations etc, there are no commentaries, but again, I'm going to record one of my own, and put it online for free. I haven't done the CvsZ one yet due to lack of time, but I might do a drunken one during Christmas. Both will be free, so you can download and listen while you watch.
Don't worry, other countries, both movies will still be coming your way - there'll be a theatrical release in the US, as reported here, CvsZ arrives in Japanese cinemas on January 12th, 2013, and other countries are in the pipeline. We'll get to most of you eventually!