Looking to combine a cable clamp and ROP

I would get the plates from some place that sells chemistry/scientific supplies to schools and the public.

I think they would be called zinc or copper electrodes, they are 1X6. As for purity, if they are used for scientific demonstrations and teaching I would suspect some decent purity.

I also scruffed the surface of both plates with a dremel to make sure I got maximum conductivity out of the metal.

A quick google search yielded the following links:

Zinc
http://gallery.bcentral.com/GID4801557-Shop.aspx?SearchString=zinc&SearchButton=


Copper
http://gallery.bcentral.com/GID4801557-Shop.aspx?SearchString=copper&SearchButton=


I have NOT done business with these guys so I DO NOT endorse them, this is just an example of what I am talking about.

I found a local supplier for the strips that I am using, you might want to try that avenue first.