I am in Michigan. Wine deals in this area are cylical but I never seem to be able to find more than a bottle or two of Darioush, or find it for less than $80. I did find a mag of the 2005 Cab last year but that burned a hole in my pocket the very first time I found a nice porterhouse to have with it.
Our Costco carries the following Cali / Napa Cabs: (IIRC)
2005 Faust 34.99
2005 Opus 169.99
2005 Simi Landslide 28.99
2005 Joeseph Phelps 44.99
2004 Silver Oak Alexander 64.99
Admittedly, I have never been a fan of Darioush wines, but I think this wine looks like a much better option both on taste and price (should you ever find the Darioush).