Your control is now obsolete and unavailable but your generator can probably be upgraded to use a newer control with a few modifications. You probably need an Elite control
and to replace the PC board. If the control cable has 6 pins this will work with the existing cable. If the control cable has 4 pins or a flat cable you will also need to replace the cable as well.
I would start by calling a Steam Bath Specialist
to help you determine the age of your existing equipment and the best way to get you steaming again.