R7PPW - 255W For Dell Optiplex 3020 / 9020 SFF Small Form Factor Power Supply - 365PowerSupply.com - Replacement Laptop Power Adapters,Desktop Power Supply & Server Workstation PSU.
New Original PSU For Dell OptiPlex 3020 9020 XE2 T1700 315W Power Supply D315ES-00 H315ES-00 4FCWX VX372 L255ES-00 L255AS-00 - AliExpress
Amazon.com: Ptcliss 255W H255ES-00 YH9D7 Power Supply for Dell Optiplex 3020 7020 9020 Precision T1700 Small Form Factor (SFF) Systems R7PPW 3XRJ0 V9MVK FP16X T4GWM M9GW7 FN3MN H255ES-00 : Electronics