All I can find is this from http://www.airhistory.org.uk/spitfire/p084.html –

PA944 PRXIT CHA M63 Benson 14-2-44 USAAF 20-4-44 HAL 5-4-45 recat E SOC 13-9-45

CHA being Chattis Hill where it was assembled and HAL being Heston Aircraft Ltd where Spitfires were both repaired and/or kitted out for the PR role.