Epson 1834255 - Replacement Pump Cap Assembly - £295-00 plus VAT - 10 Working Days
Other part numbers for the pump cap are 1585150 - 1652408 - 1639828 - 1634139 - 1671306 - 1710094 - 1734820 - 1740520.
Epson SureColor SC-30675
Epson SureColor SC-S50600 SC-S50610 SC-S50670
Epson SureColor SC-S70600 SC-S70610 SC-S70670
Compass Micro say "This part is difficult to replace and does not come with instructions."
Includes wiper and wiper cleaner, reference numbers 530 & 531, as shown on the exploded diagram.