Yes its been found pretty widely outside the US and its certainly still in stores here in the UK. However so far I dont think it has even been spotted in the US. Its not an international release, it is a "world wide" product it just genuinely doesnt seem to have appeared with any US retailers as yet - whether this is because they are still stocked with the previous Story Pack wave and havent moved on to wave 3 yet or because they wont be carrying the Story Packs any more now that we are technically into the next "toy year" or they werent popular enough we dont know.
They could still well turn up and the fact there were no more Story Packs announced for later this year does imply they could well still hit stores but its far from certain unfortunately - US retailers may end up skipping this wave much as they did Wave 2 blind bag in order to "catch up".