I just got one from Argweld. I have not used it yet. Try this site.
www.huntingdonfusion.com

Gary

Delta-F is very good, http://www.delta-f.com.
This unit is very stable and does not "wear out" like systems that use a replaceable cell. This system uses a small reservoir of potassium hydroxide which you only need to replenish with distilled water occasionally.

Thanks for the replies, gentlemen.
Mankenberg