Very common control system used in Monarch and others. May be listed as SP750, SP750A20, SP750A30, SP750B20, SP750B30. This part is now Obsolete, but they may be able to be repaired, along with touchpad.
Please Post Control Systems & Touchpads for Repair to:
Melbourne Spa Repairs
PO Box 3148
Mornington Vic 3931
Spa-Quip SP 750