In addition to a RTF you need to be able to buy replacement parts for your hydro, without that it’s not nearly as useful.

I just hit paydirt, I knew if I kept searching for hours and hours it would pay off.

Here is a site that sells the parts to the RCA hydrofoam, so I now have a chance of getting my hydrofoam working again, I just have to figure out which part I need.

HydroFoam Parts

I found these guy on ebay, that's where they sell the HydroFoams

http://myworld.ebay.com/glorettag/