Not exactly the stump you are asking for and I have not purchased from them yet, but you can select which piece you are buying from them. I keep a watch on new pieces for something interesting.
I've bought manzanita from blooms and branches. Works great, I get the sandblasted stuff. Just takes a week or two to sink.
Not exactly a stump but maybe you could combine the branches with a larger piece to get the look you want.