Here is a great version for you: TAST #127 - Beaded Alternating Up and Down Buttonhole Stitch.
Do you remember that I thought its unbeaded version was 'barbed wire'? I had difficulty making it look nice on a curve. Well, others made wonderful curves, Chitra for example, so I just had to try again. This time I used a stencil to draw neat curves and took pains to followed them. However, the 'barbed wire look' is still there as I have used various lengths on the arms. I also used a variety of stray beads, some blood red! The result is maybe an organised messy bloodshed!