Kat, Try this: http://www.plantdelights.com/Catalog/Current/page59.html.
A little info, and you can order from them.

Yes.. I have the catlog of 2005 Spring.. I prefer to buy it at the nursery in Arkansas. The Plant Delight shipping is soo expensive! Smile..

I saw some of these for sale at a site that had some others on EBay. I think the sellers name was wuvie. She had her own site with those listed. They are also called devils claw and considered invasive weeds in some states. So be careful with these

Here is a link that might be useful: Wuvie's Site

Are you anywhere close to Bear Creek nursery? They've been here for garden shows before and have lots of unusual stuff and pretty decent prices. It might be a good place to check. I didn't find an online catalog for them.

I found this link with Bear Creek's address (I think). They're in Eureka Springs. I'm not sure whether Ozark Bamboo Garden and Bear Creek nursery are in the same location.

Here is a link that might be useful: Ozark Bamboo Garden/Bear Creek