Sorry about this...
We can't actually ship North British 50 Year Old (casks 90592 and 90593) - Exceptional Casks (Berry Bros. & Rudd) to the United States at the moment (although we're working hard to fix that).
In the meantime, our friends over at The Whisky Shop might be able to help you out.
Thank you for your support and understanding 🙂
-The folks at Master of Malt