there were only 500 cases produced, and it is pretty much common knowledge that all have sold. you may be able to find a box on the bay, but expect to pay upwards of $250us.
the second ufc series was due to b released already, but has been pushed back until at least september. presales have been happening for a while, but may have dried up now. there was a promo pack and some manufactured patch cards released as a teaser at ufc100, but other than that all the cards you see are from the first release.