I have never been too impressed with Grande myself, I think it oils off too much but for the members in the Bay Area here, Mollie Stone's sell Grande Whole Milk mozza and their Provolone in 1lb increments. Not cheap, though. I think it's about $8.00/lb.
An extremely good alternative to Grande is the mozzarella from Cascade Diary Products in Hayward, CA. They used to make the North Beach mozzarella for Trader Joe's but I believe TJ's has now their own label.
North Beach mozzarella is an excellent product. I have raved about it a few times on here and much better, imo, than Grande. Not to mention it's reasonably priced. Great flavor, heat tolerance and melting capabilities.
I know Costco carries it in blocks or shredded. For more info you may have to give them a call.
Cascade Dairy Products
21090 Cabot Blvd
Hayward, California 94545