SSP-500ES2 | Seasonic 500W ATX Power Supply, 100 → 240V ac Input, 3.3V Output | RS
Power Supply Units (PSU) up to 500 Watts at Overclockers UK
RS PRO 500W PC Power Supply, 200 → 240V ac Input, 3.3V, 5V, 5VSB, 12V, -12V Output | RS
JUSTOP CIT Value 500W ATX PC Power Supply PSU With 12CM Quiet Fan And 3 x SATA / 24-PIN / 4+4-PIN 12V / 2 x MOLEX / 1 x Floppy : Amazon.co.uk: Computers & Accessories
500W ATX Power Supply with 24pin 4pin and Sata Connector | Pcdirectuk.com