I've looked and can't find anything and I'm usually pretty good at finding things.
Here's a stitch pattern you might be able to incorporate into a blanket.
http://www.vogueknitting.com/node/440
And here's some info I found on knitting argyle.
http://knitwit.blogspot.com/2004_12_01_archive.html
http://scrubberbum.typepad.com/moth_...e_origami.html
One of the patterns I linked to is a diamond blanket if that is all you want.