I need shopping help! DS is crushed!

My DS had this shirt and LOVED it.  He got it from his cousin as a hand me down.  It's lost and he's so upset.  And I have no idea how we managed to lose a shirt but that is a whole other story.  I can not find it anywhere and was hoping for some help.  It's made by Junk Food for Gap Kids.  And I need it in a 4/5 or 6/7.  He had a 6/7 but it was a little big and at this point, I'd take whatever I can find.  Sorry if the picture is huge but I'm not sure how to adjust it.  TIA for any help you can offer!!