I was having the same issue, and I read here on the forums that you find it in another party member's house; which you can't get to yet. Not sure when you can find it though, since I'm not too much farther than you.
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If you play on Milla's story, you'll have to come back to Hamil later right around when Elize is able to fight, then visit the house where the shack (or basement) was locked before Elize joined your party.
I was playing Milla's story, and I got it right when we picked up Elize. I figured 'hmm, if she's out here then that door's probably unlocked', went to check, it was and I grabbed the porange. Once you get through various cutscenes, don't go to the village exit, turn around and check out that shed before you leave.