Our very own Dunster designed and wrote a pattern for Diamond Log Cabin. She uses it as her Avatar. You might want to try PMing Dunster to see if she still has copies of the pattern for sale. She self published it and the quilts that have been made from it are drop dead gorgeous.
Here is a link to one of her posts about it.
http://www.quiltingboard.com/picture...ed-t55682.html