i think you could make this with tunisian. when it gets the the split, you could keep working half the stitches until both halves are long enough and then start stitching across the entire piece again at the other end.
Like the look, just have to figure out the graphic
This is a beautiful cabled design, and if you can read a chart you'll get it the first try. (Try Design)
Белая туника по стопам китайских рукодельниц.
Beautiful pattern with needles
Another beautiful charted cable