Yes, you are right about discontinued parts,
but i think the parts can repair by send to Nagoya (Japan),
BTW, I can repair OSBB-01-DWC,
or you can try call Mitsubishi Electric Asia (MEAP)
Contact Person, MOTOYA FURUICHI SAN, Motoya.Furuichi@asia.meap.com
You can tell me about the problem, May i can help you
Focus Electric CV.
Mitsubishi Electric EDM System