Woodmeizer is a manufacturer of portable sawmills and they keep a list somewhere of registered owners. That and woodnet.net is a good start.
Post what you are looking for. You'll also need the dimensions of the trees. When sawn, I believe stock blanks are 3" thick x 32-34" long, 7" wide at the butt, tapering to 2" wide at the forearm tip.
I have a Mesquite Log 22" in Diameter, and 6' long, and may get 2-3 usable blanks out of it.
The pith must be avoided as it is the most unstable, and there can be some sapwood on the outside, as long as you're sure it will be machined away.
Listen to sitka about branch wood. It's barely suitable for pens, pencils, and bottle stoppers.
