Most of mine I cut myself. I lived in Houston for 8 years, and despite the great lumberyards (houston hardwoods, clarks, masons and brazos forest products) for a good selection of wood, the selection of live edge pieces was abysmal, which is one of the main things that prompted me in to cutting them myself when I moved to Fort Worth (selection isn't much better up here). Clark's has them sometimes, but they are very proud of them from the few I saw.
I can actually get wood shipped in cheaper than I can find it locally. There are usually some sawmills around that will slab stuff up, but they often don't dry them. The only kilns I am aware of are M&G sawmill in Huntsville, Phillips Forest Products in NE Texas, and Harden Cabinets/Sawmill in Sander, TX.
What size/species are you looking for?