retrofit a/c to disco 2

Hi guys, recently bought a Disco 2 without a/c, and just typical, probably going to have the hottest summer in years!!! anyone know whether it is possible to retrofit a/c and is it worth doing cost wise. Previously had Disco 300tdi Argyll spec ed for 8 years till wife decided not to put on handbrake properly and sent itself to LR valhalla.