Thanks for all of the replies.
I hadn't taken into account that the technology was "sold" to a start-up and that would account for the "silence" since the late 90's.
From what limited info I have read, the system doesn't seem too complex, however, it is not "passive" like batteries.
The controller and pumps wouldn't be to hard to create. Since the electrolyte solutions isn't too toxic, if that is possible, it would seem PVC or some sort of plastic could be utilized for the tanks, piping, and pumps.
The complex part, at least to me, is the "stack". Looks very similar to Fuel-Cell membranes. Need to do a little more research on that, but the only exotic material seems to be the ion exchange membrane. Everything else in the stack looks like plastic, copper, and either felt or kevlar.
I am just a newbie, but the idea is fascinating to me and seems to be the holy grail of battery storage for home systems.
Later.