I actually bought the supplies to make several of those... I just haven't finished assembling any of them. Started one weekend when the wife and son were away, but got busy with other things. Maybe this winter.
I've been following the blog from this guy... Mikey Sklar... who saw that original desulphator design, and decided to improve it.
his blog... Holy Scrap Hot Springs
his desulphator... :: Mikey Sklar :: Electric Clothing :: Holy Scrap Hot Springs: Bulk Desulfators
He is also working on another desulphator... Holy Scrap Hot Springs: Battery deluxe (BatDLX)