There are so many Star of Bethelem interpretations! Try Googling "king size star of bethlehem quilt pattern", then click on "images" to find a photo of one you like. I did this and came up with the following website with a number of different queen size patterns (to which you could add borders to get to king size), but may not be exactly what you are looking for:
http://www.plainandsimplequilts.com/queen.htm
Oops. Sorry, those are finished quilts. I will see if I can find a link to some patterns.