are you wanting one that is a single hexagon, or made of several, and how big. I don't have a "pattern".. but I do have a 60 degree diamond ruler.. if you just use it you can cut 6 triangles with it and have your hexagon.
works great for fussy cutting, etc. I just cut a strip, then put the edge of the fabric across the diamond and voila!.. a triangle is a bit easier, all you need is to make sure it's 60 degrees.