StarTech.com 3ft USB to RS232 DB9 Serial Adapter Cable - M/M - serial adapter - USB 2.0 - RS-232

The ICUSB232SM3 3ft USB to Serial Adapter Cable lets you connect DB9 RS232 serial devices to your Mac or PC laptop or desktop computer through an available USB port, as though the computer offered an onboard DB9M connector.

Price: £ 25.86 from Currys Business