Hi Puck:
The 31st and 52nd Fighter Groups of the USAAF used Spitfires in the Mediterranean Theater of Operations from Nov. 42 into Spring of 1944. I created a web page on the 31st quite a few years ago that discusses their use of Spitfires, see:
31st Fighter GroupThere are some scans of Combat Reports from 52nd Fighter Group pilots whilst flying Spitfire IX’s
HERE
52nd FG Spitfire IX EN 354, La Sebala, Tunisia, June 1943

31st FG Spitfire IX EN 307, Le Sers, Tunisia, May 1943
Of course the 4th FG used Spitfires in the ETO. There were a number of units that used them for photo recce also.
Mike