ST Microelectronics also has a forum where you can post questions and other requests.
I guess you could always give the branch office in your area a phone call, that would certainly get their attention.
One other option is to find schematics of a TV which utilizes the M705B1, from that you could then figure out the pinout.
I found several posting concerning the M705B1 on the Polish version of this forum, maybe one of that forum members has the pinout.
BigDog