We've got Costco in UK. They're not everywhere (nearest one to us is Haydock) but we do go from time to time. I picked up a 12y/o Singleton there last month for about 10 quid lighter than elsewhere but I've not seen any 40y/o. If they have got some I'll have a shuftie after Christmas. I imagine it'll still be there, I doubt it will be flying off the shelf at that price anyway.