I don't recall if there's any merchandise available of the film. You'd think there would be some things... but I don't think they've even released a poster, which is a shame. I'm just glad I won that poster on Twitter... it's the closest thing regarding the movie I'm ever going to have the chance to own myself, besides the Blu-Ray itself.
(If anything, perhaps you can find one online, like on Amazon or something. That's... the best advice I can give, though I know even that's a long-shot.)
I hope you're able to find something. Good luck with that.