Where/when can I buy the Lady Gaga ‘Telephone’ poster?

Lady Gaga (feat. Beyonce)’s single ‘Telephone’ was released last month and there’s an amazing poster for it floating around the interweb. It’s very 60s and looks almost hand-painted.
Does anyone know when or where I can buy this poster? I live in the UK but am travelling to the US soon.
Thank you.

ebay ?

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