Swaddlers in Bulk

Anyone have any tips on purchasing Pampers Swaddlers in bulk? They’ve always been our favorite and I usually buy the big box not the little pack, but I’m wondering if there’s a better way to purchase than simply getting the box?

Amazon? (Would Amazon Prime be worth it?) Directly from the site?

Do any of you have experience to give some tips?

I’d recently switched to Kirkland’s brand at Costco only due to the cost effectiveness but we’ve been having leaks and I’m not happy about that!