Are you using "Jacuzzi" as a brand name or as a generic term for a spa? If it is the brand name, I'd start be getting any/all identification numbers and names possible, especially a model number or name. Try to identify every part that you will need. Some may be standard plumbing parts, other may be brand specific. Then contact Jacuzzi and see if they have the parts you need. I would not hold out much hope in finding obsolete parts at a dealer, but you never know. It could be that newer controls might retrofit. I had that experience with my 10 year old Hot Springs Spa recently. My heat failed and the replacement was totally different in appearance but it had been designed by Hot Springs to retrofit older spas. Works great!