Reason it's not available on iTunes in your region is because it's not theirs to sell.

A film producer sells a film to a sales agent. That sales agent then sells the films to distributors in as many territories as they can. The terms of that deal restricts the distributor from infringing on other territories, so they can make the film available on various platforms in their own region - DVD/blu-ray/DTO, VOD (Video on Demand - iTunes and Netflix etc), cinema, TV broadcast, airlines etc - but not the regions of other territories. It's partly to make sure that film sales is a level playing field and also because it means that a sales agent can get a minimum guarantee from each region that is probably worth more than the film will actually make in that region.

Something like White Gold mentioned below is available on Netflix in US but not the UK because the BBC have sold the VOD rights to Netflix in all regions excluding the U.K., because the BBC wants to retain the rights to keep it on iPlayer.

Posted By: tim berry, Oct 7, 17:06:54