Yeah Trevor - Tennessee Wheel and Tire - sorry I just find it easier than typing out the company name.
Sux that 225/70/19.5 (which is just a hair taller than a stocker 235/75/16) is lowest you can get them. I heard a crazy rumor there were shorter ones but I seriously doubt it was true. Since practically nobody uses 19.5's for anything other than a serious work truck, I just don't see it happening.
Richard