I think this free pattern is similar in concept:
http://auntiestwo.com/portfolio-view...d-groovy-baby/
It at least will give you an idea of WHAT you will be doing to achieve the rug. I like to know a bit more about the “how” before I purchase a pattern and find the mystery to maintain marketshare silly and think their sales for the pattern would be larger if not so protective of their “idea” which most likely is not even original.