Colleen - I've not yet tried it, but here are a couple of links from the designer's website that might help:
http://www.kimberlyeinmo.com/categor...ly-roll-ruler/ and
http://www.kimberlyeinmo.com/?s=starburst
Also, @ the top of the website, there's a link to contact her, so if those links don't help, maybe send her an e-mail? Good luck!