I have 204 raw mxf files from a Panasonic p2 card.Unfortunately, the file structure is gone and there's no way to edit this videos? I hope not. I am only hoping at this point to convert these files to useable formats and manually sync up the audio files and the video files.
I have tried to convert a handful of converters, no good result. Which one did you recommended?

Sorry to hear that. It’s a pain that do not have the original structure of video. I understand as I ever happen to this also. I am happy to find a third party software to help convert my separate video files so that I can finish my job. Thanks God. You can try it, it called Pavtube MXF Converter for Mac, especially designed to deal with MXF files, does a good job on convert P2 MXF, audio and video sync up automatically. Download a free trail from below to convert your separate mxf file to editing software compatible format like ProRes or AIC.
http://www.pavtube.com/hd-video-converter-mac/