CDS Parts - Dell Optiplex 3020 7020 9020 Precision T1700 Power Supply 365W T1M43
Dell Optiplex 3020 255W Power Supply (NT1XP)
Amazon.com: AC255ES-00 PCB050 255W Power Supply Compatible with Dell Optiplex 3020 7020 9020 Precision T1700 Small Form Factor SFF Systems : Electronics