It’s only the Tungsten electrode rod that probably needs replacing, as that’s how long they last. Just like on my Magnat MP-02 Plasma’s.
hiendmmoe
plasma tweeter replacement every 5000 hours.
I bought the right diameter rods on ebay got a machine shop to cut them to length and dome shape the end.
https://ibb.co/RgH2jms
https://ibb.co/q5JYHkN
Cheers George