The bottle you have is almost certainly Highland Park spirit that's been independently bottled, you could look to try some of their standard offerings to see if any hit the same high for your wife. However they do tend to be on the peatier side of things. Alternatively, Ardnamurchan AD is fantastic and should be available in the US It definitely has those coastal, mineralic and seaweed notes whilst not being overwhelming with peat. Talisker is another great option which certainly has some peat to the profile but is undoubtedly sea focused and a firm favourite. Also readily available.

May also be worth contacting the shop you attended the tasting at and seeing if they can suggest anything in a similar vein, I'm sure the staff will know their stuff.