What does it look like at the end? Have you checked missouriquiltco.com
and modabakeshop.com?

Try this one.
http://quiltville.com/striptwistpf.html

This one?

http://www.quiltingboard.com/t-44258-1.htm A reply post was mentioned about cutting into sub groups?

Look on page 14 and 15 on the above post link.