Blu2u. Again may I say welcome to the forum. I to recommend the Samba site for VW info.
Off the top of my head ,the only overseas kit producer was MPLafer. Look in the photo gallery under BrasilUSA and see if your car looks like the one in the picture. Notice that the doors are hinged at the front instead of at the rear as all other MG replicas . Also check out other members in the gallery and see which ones look most like your car..
MG MAGIC in Hollywood Florida [contact info in the links section] has parts for Classic Motor Carriages and Fiberfab kits. Moss Motors has original MG parts. Post some pictures when you can and that will help us to identify what you have.