Dell J1J77 OptiPlex 3040 5040 180W 4-Pin SFF Desktop Power Supply at TR Reuse Group
Amazon.com: 240W Computer Power Supply, Power Supply for DELL Optiplex, for DELL 3040 3046 3250 3650 3656 5040 7040 SFF System AC Excellent Performance : Electronics
240W Dell Optiplex 7040 PC power supply for Dell Optiplex 3040 3046 3050 5040 7040 MT SFF 240W power supply - Portable-Adapter.com
RN5TM Dell 180-Watts Power Supply for OptiPlex 3040 5040 7040 Sff