What is the largest winery that supplies sacramental wine to the Catholic Church? As the question states, I would like to know what is the largest winery that supplies sacramental wine for the Catholic Church?

By largest supplier to the Catholic Church of sacramental wine, I mean by volume sold to the Church in liters/gallons?
The nation's largest producer, the Mont La Salle Altar Wine Company in the Napa Valley of California, makes a rose of petite sirah, zinfandel, ruby cabernet and cabernet sauvignon.


From the NY Times: Sacramental Wine, Lowest Profile of All

Mont La Salle Altar Wines website

I love the screw cap!