Unfortunately, power supplies are no longer available from and and it is a special power supply with a positive and negative +/- 6.6 operating voltage. Below you will find a circuit diagram to recreate it if necessary. Possibly you can find a used Nobels SST-1 or SST-1X power supply or Rockmann X100 power supply on ebay.
Both would work too.

I lost my power supply for the SST-1 - what can I do? 1

SST-1 Power Supply Schematic