Reddit reviews Batman v Superman Dawn of Justice Ben Affleck as Batman Bruce Wayne Suited Up 11 x 17 Poster Litho

Here are a few more I found on amazon. Once again, they may not be exactly the same, but they do show off more of the suit.

https://www.amazon.com/Batman-vs-Superman--Poster-36in/dp/B01B35YM4U/ref=sr_1_12?ie=UTF8&qid=1472944736&sr=8-12&keywords=batman+v+superman+poster This one hasn't got the same pose, but it has the suit and the batmobile.

https://www.amazon.com/FRAMED-Batman-Superman-Gothams-Premium/dp/B01BHBWVBQ/ref=sr_1_14?ie=UTF8&qid=1472944768&sr=8-14&keywords=batman+v+superman+ben+affleck+poster This one has got the pose, but its been vandalised (may have been part of the movie.)

https://www.amazon.com/Batman-Superman-Justice-Affleck-Suited/dp/B01E66UXGE/ref=sr_1_13?ie=UTF8&qid=1472944768&sr=8-13&keywords=batman+v+superman+ben+affleck+poster This one porbably isn't a match at all, but it shows of the suit.

Apart from that, you may just have to keep on looking, I didn't get very far into what was on amazon, it may exist, maybe you might find better search terms than I did, but hopefully this is a start.