Years is a little long for an open bottle. But they will keep fine for a couple weeks IMO. Beyond that, not so sure.
Sandeman is not readily available where I shop. TF, Fonseca, Warre's. Sometimes Noval. I've laid down vintages from the birth years of my kids, but unfortunately 2009 was not a vintage year. I will have to get Bordeaux or else a Colheita for that year.