I've been trying to get a good marble pastry slab for a couple of years with no results. The local cooking store only carries thin, puny ones because they say it's hard to get big ones b/c they break or are hard to ship or something. I am sick to death of rolling dough on cutting boards, slippy sil-pats, crumby counters. Marble, I wante marble! Any suggestions on where to find it? Could I just go to the hardware store?