korg z1 parts for repail (audio-midi board)

[njeremic]

hi dear korg users
I own a z1 and my audio outputs are not working properly (working but having contact problem) so I'm using headphones output. I would like to change complete audio-midi board myself and I was writing to korg support asking for part but never got an answer. do you know where I can ask for this part and order it? or any other ideas how I can fix it? I have a bit experience in opening synths and fixing bad backlights and some other minor issues
thanx in advance
Niko