I'm not sure which motor Chris used on the early Teres tables but if it's the same motor Thom Mackris used in his Galiber table that motor is no longer available. I emailed Maxon a couple years ago and this is their reply..
My name is Eugene and I am a Motion Control Applications Engineer at maxon. I received your inquiry for a replacement motor for your current S26, Precious Metal Brushes, 4 W (2326.933-12.111-050).
The motor that is the closest replacement for your S26 motor is the A-max 26, Precious Metal Brushes CLL, 4 W (110169). Please see below for the cross reference.
S26 A-max 26
Speed Torque Gradient (rpm/mNm): 181 190
Speed Constant (rpm/V): 1330 1380
Torque Constant (mNm/A): 7.19 6.94
Have you cleaned the pulley / platter with rubbing alcohol?
Good Luck!
Scott