I’d say stay with it. He’s usually overwhelmingly responsive, to the point that I have had a replacement on its way within minutes of even sending the email before. If he hasn’t answered you, he probably has something going on but will more than likely reply soon.
I agree with @BarrelProof and @dochowl, give it a little time. He's usually pretty quick with responding with such inquiries, but he also works a "regular" job and every time there's a new drop he's got a bunch of orders to ship out so he can have trouble getting to it right away. And I've definitely had responses go to my spam folder as well.