If you live in the Eastern US, a great place to order from is Double A Vineyards in Fredonia, NY
Be warned that there are whispers about problems with Crown Gall in vines sold by Double A. I hate to spread anything that is untrue but I have been told this enough times by commercial growers, wineries and other nurseries that I can not ignore that it may be true. Proceed with caution.
Also note that there are other East Coast nurseries that appear to be independent that rely on Double A for their stock. This sad tale was related to me by one commercial winery in Virginia that bought replant stock from Double A due to crown gall problems with previous vines only to find out the two companies had a business relationship and his new vines may originate from the same source material.
I am on the east coast but have worked with west coast nurseries for the 225 vines I have planted. I have not had any issues with quality or service despite my small order quantity or the fact that I am east coast. I would not let where you reside dictate your choice of nursery.