I thought there was one at knitpicks, but not quite.
I made the Vicorian Lace one from knitpicks, but just knit the headband the length from just below one ear to just below the other. then I knit i-cord at each end so I could tie it. You can pretty much do the same with any headband pattern you find.
Even use any stitch pattern that comes out as wide as you want it then knit it to length and do the i-cord thing. or even a simple crochet chain tie. Or a couple stands of the yarn and braid it for the ties.