Even looking on the Robert Mondavi site gives no indication of this wine existing.
Not sure where you are up here (Scotland) but there is an American Wine merchants here in Edinburgh called Sideways. So whilst they may not actually stock it (they are specialist and don't tend to go for brands usually found in the supermarkets) they may be able to at least give you a pointer as to whether it is still imported or even still exists.
Their number is 0131 668 4207 and they are on St Leonard's St just down a bit from the Pool if you are familiar with Edinburgh.
Have you tried any supermarkets you can get to, i once worked for sainsburyas near me and we sold robert mondavi rose wine, i live in england though so it could be different for you