All devices in the 3G System - 2GΩ Omega and 3G Ultra - use the same format of power supply:
Power supplies with these specifications can be found at any electronics retailer that sells power supplies.
Example Power Supply: https://www.digikey.com/product-detail/en/phihong-usa/AA10A-050A-R/993-AA10A-050A-R-ND/11203820