Douglas Laing, one of the well known independent bottlers, have an Old Particular range, where they present single casks of whisky that has reached a certain age at cask strength, which includes single grains...
Well, this is awkward. I have only got a clue what the dram behind door number 18 of the Drinks by the Dram calendar 2015 can be (a single grain, probably a Girvan), but without the label it is rather tough to say exactly what is in my glass.