The spray bars are a custom build from CPVC and those parts should be available at Home Depot, Lowes, or your local building supply/plumbing warehouse. The valve on the main line thats leaking is letting water drain out when running underway and your fish go dry. That FlowRite valve and cable assembly is either a loose cable that slips instead of moving the arm, or the rubber lap inside the valve is aged and needs replacing. BCB does not stock the rubber flapper, though they do sell the valve.