Seeking Roland HP 330 Volume / Display / Buttons board

Ho! Im trying to locate a volume slider, controls, buttons board for hp330.

I had to move 20 years ago and gutted the whole body saving the amp section and misplaced the control panel.

The plan: i was already using a Yamaha ES8 so I figured it’d make a cool midi slave.

Welp, cant use it lol. So its now a stereo guitar amp! (Same speakers!!) But I still want to get this into a midi module as the piano had a special sound.

Or anyone know pinouts to just get sound from piano 1 default?