Hold up — there are three of them! I just got a newsletter from Knit Purl (sister company of Shibui) touting a third box top, also by Lydia Tsymbal. (See the other two here.) This one is called Stark and is designed for their new yarn, Hayden, a silk-wrapped cotton. They’ve got kits on their site.
Always bummed when patterns are sold in kits and not sold separately. :(