Angelo of Touch Move is a FIDE rater but he will not touch you until you are above 1800 (I think) USCF. You can also find and join a FIDE rated tourney. I have a ICCF rating which I believe can be used for FIDE correspondence. Also see if there is an FIDE corr rating that you can start with.
You can go to the FIDE Site and look for tournaments that are FIDE rated. In fact the Open Section at the Chicago Open and the U2300 are FIDE rated. I will look for more and let you know.
You have to play in FIDE tournaments and have a performance rating of above 1800 I think, and maintain that for 10 games.