Matt,
I'm sorry. I just saw your PM. Unless something is a bit personal, I have always tried to keep all communicationon the threads for all to see and maybe benefit from.
I would think that Pro Source can get any tile you want. I have used Pro Source twice and each time was at a different store. The first store was happy with me just giving them my contractors name who was a member. The second store asked for my contractors name and he wasn't a member. But with that purchase the savings would have been more than enough to justify me paying his membership, however, Pro Source made it easy. The sales person just said 'I know a contractor's name we can use and the discount will be even better'. I was quite happy. The sales guy even offered to deliver the tile in his personal truck.
This kind of service is what motivates me to write nice things about a company.