Twin, a new seed bead from the PRECIOSA Traditional Czech Beads brand, offers much more creativity and possibilities.
John Bead has them in stock and here are so many colours to choose from.
To learn more about this new bead, Preciosa has a wonderful information page here.
I discovered a free set of instructions for this amazing bracelet. Linked here. The relatively simple procedure using the so-called herringbone stitch will enable you to try working with this unique Czech seed bead with two holes.