TruConnect CN-DCA-001 2.5mm to 2.1mm DC Power Plug Adaptor

TruConnect-DC-Power-Plug-Adaptors-TruConnect-CN-DCA-001-p-A-DC-power-plug-adaptor-with-a-2-5mm-socket-and-a-2-1mm-plug-p-TruConnect-CN-DCA-001-2-5mm-to-2-1mm-DC-Power-Plug-Adaptor

Price: 1.68 from Rapid Online Rapid Electronics Ltd.