Our Triopure chlorinator/ozonator needed new ozone cells. I ordered them from Inyopools and they arrived quickly and well-packaged. The instructions enclosed were easy to follow and the cells were installed within an hour of getting the box in the mail.
Parts are pricey for this gear. If you haven't replaced the check valve on this system, I'd highly recommend it! Water can enter the cells and damage them when the unit is shut off and the main filtration/circulating pump is on.
It's worth checking to see if your Triopure unit is under warranty before you go shopping elsewhere. They can also offer discounts on bigger parts.