http://img.hgtv.com/HGTV/2006/02/16/...rongs_w190.jpg
Does anyone know where they can be bought?

Hmm, don't remember seeing that one. But I have seen the dandelion
corkscrew (figure G at
http://www.hgtv.com/hgtv/gl_tools_eq...5036%2c00.html
) being sold at Merrifield Garden Center
( http://www.merrifieldgardencenter.com/ )
in suburban Washington, DC.

Your post is the first time I've seen any reference to the corkscrew.
I was intrigued by it in the store but somewhat skeptical about
whether it would really be an improvement over the old standby
dandelion spade (
http://www.comparestoreprices.co.uk/...less-steel.asp
).