Michael, No, you are not dreaming about the Ferric Chloride from
Radio Shack. Check the catalog. Look under circuit board supplies.
That may also jog the memory of some clerk at Radio Shack. I might
also suggest that you try a different Radio Shack than the one that
you went to the first time. Some do not want to take the time nor
effort to make the customer happy. The full description on the
bottle that I have is Radio Shack PCB Etchant Solution "use full
strength Contains Ferric Chloride". Part number 276-1535a. This is
for 16 fl. oz. You might also want to try
http://www.tandyleather.com as they are the parent company of Radio
Shack. I think the clue is the title of the material according to
Radio Shack... the "PCB Etchant". Clerks do not necessarily equate a
title of a product with the actual chemical.
http://www.artmondo.net/printworks/articles/ferric.htm contains a
wonderful article on ferric chloride.
As for the copper sulfate. You are again asking tough questions. I
had to get mine at a feed store. They had to special order it and
it did take 3 weeks. It was not expensive, just a pain to get. Some
of the uses are for keeping small ponds clean of algae and for weed
control. We have lots of waterways, so this is a product that would
have a commercial use. The following place is a farm supply place,
they have the chemicals you are looking for if you cannot find them
closer to home. http://www.groworganic.com