RN sells barrels with keys. I bought a set- included ignition, both front doors and the rear door, so I'll have one key for the vehicle instead of the 4 is came with. Be aware, there are (at least) two different barrel lengths. I had to buy a Puma rear door handle so the barrel would match- to the tune of about a million dollars (felt like it).
Current fleet: '85 Ninety 3.9 V8i Auto SW,'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.