I dont know what version of the Oracle you have, but the 27vdc only works on mk 1 and 2. Mk 3 up uses 12vac and has a more complicated control circuit. the Turbo supply is something different also. You can get the 24vdc wall wart power supply directly from Oracle for about $100 or the turbo supply for much much more. but, for $2000, I think you are referring to the motor controller.
Dead Oracle
Help my Oracle power supply hs given up t ghost andi cannot aford the replacement a it would cost nearly 2000.00 pounds I am retired so i am after a second hand one. We have tried to fix it and found that the drive transistors which activat the Hall efect mor are kaput but I cannot find the equivalent. So if any one has any of these spare or have an idea to sort the problem i would really appreciate it as there are 2000 plus records to play TIA