Korg Oasys 88 motherboard

Again post question about this synth.
Did anybody successfully replace motherboard for different brand than aopen ?
Or did anybody have original motherboard for sale ?
In my work (cnc service) with group of electronics colleagues we try everything to repair or change motherboard and it’s almost impossible without original drivers for different copy of Linux and only one chance is to have motherboard for change.
For now it’s only very expensive pile of electronic parts :frowning:
Please for any help synth wizards !