Not sure if this is the right forum for this post, but this is the forum that I always gravitate to, so thought it might be the right place.
I live in Toronto, and my sister is currently traveling through the UK and returning in a couple of weeks. She has offered to bring something back for me and as I would like to make her purchase as seamless as possible, I would probably only ask her to get something for me at the duty free in Heathrow. In the past, I have asked her to come back with something "along the lines of a Laphroaig or Lag, that you can't get in North America" and while this approach has occasionally delivered some nice results, more often than not (and I am surely not criticizing my sister), she has been sold something that is...ok.
I am very partial to the Laphroaig 10 (more so than the Quarter Cask or even the 15) and the "old" Ardbeg 10 is one of my favourites. Clearly, I am looking for something along those lines, that you cannot readily get in North America, (or at least in Canada).
Does anyone have a specific suggestion that they know can be found in the duty free at Heathrow that I can say to my sister, "please get me ____"?
Any help would be greatly appreciated.
TIA (thanx in advance)

