In France, close to the belgian border, I would suggest you contact former MGR dealer Falvo Automobiles in Tourcoing, they still have a garage where they service MGR cars among other things and he owns a ZT 260.
Further south near Paris, the "Garage de Sir Lucas" in Le-Plessis-Bouchard is highly recommended...
1999 2.5 V6 Rover 75 Connoisseur - Dealer Launch - LHD
2004 4.6 V8 MG ZT-T (the only known auto ZT-T V8) - LHD
1993 2.7 V6 Rover 827 Coupé - LHD
1993 Rover 216 GSi
1975 Rover P6 3500