Hi there. New here so please tell ke if this is the wrong place. My MIL has a Hayward puresilk PS15LS system with a completely blown cell (13 years old, never replaced) ive got the system up and running except for one problem. For the life of me I cannot find a replacement cell for this system. I can't find a hayward cell or even an aftermarket knock off (other than a single shop in Australia for $700).Is this my only option or can anyone help?