Try the Vantaggio brand whole milk, aged mozzarella. It's suppose to be right up there and on par with Grande if not better without the hefty price tag. I'm trying to get my hands a 6lb loaf and as soon as I tried it, I'll report back.
I bought some Vantaggio for my last pies at my local Italian import store. I didn't remind me of Grande. Jury's still out. I'll need to work with it some more.