Hey Jay,
This is one that I don't know much about. I can however suggest a couple of alternatives if you are fond of Mt. Veeder AVA and Stags Leap AVA cabs.
Hess is located on Mt. Veeder and the do produce a couple of Mt Veeder cabs and blends, along with some very good Chardonnay, and other unusual things such as Alborino, a Spanish white grape which the also grow up on Mt/. Veeder.
Cliff Lede produces Cabs and Cab blends from fruit coming from the Stags Leap, Diamond Mt, and Howell Mt. AVAs. The wines from these AVA's have a very distinctive terroir and it is a real treat to taste them side by side. The first time my wife and I went there I had them pour a glass each of the 2005 vintage from all three AVAs and we tasted then side by side. For the next hour I took my wife through the nuances of each wines nose and palate. When we were done the tasting room manager comes over and says to me that he overheard what I was discussing with my wife and offered me a job in their tasting room saying that I had done a great job of explaining the differences in the wines.
I suggest these two because they are not as highly allocated and much readily available to you, provided you like mountain cabs in general.