Thanks Adam, I'll check them out during business hours.
The Sony Rep was nice enough to send me by Email a PDF of the relevant pages of the Repair Manual. The exploded diagram shows the belt but it's labeled 'Not Available' with no reference to a part #.
I'm no Technician, but when I pulled the top cover off I was able to see just two belts, the very much smaller of the two being the one that transfers torque from the motor to the drive gear that rotates the platter via the larger belt that I need. The small belt has easy access but the larger platter belt is nested deeper than I wanna' dig.
I'm not sure if the large platter belt is broken, stretched or just off its track, so I'm hesitant to cut it out to inspect it for a part #. I suppose I should just pay a Tech the 70 bucks or so and get a full diagnosis. If after that we discover the existing belt can be replaced/repaired/aligned, I'm good to go. If it does need to be replaced and there is no part available, well... I'm out $70 and faced with selling it as a parts mule I guess.