I do have a full leader in paragon that I could level up. However, he would be ineffectual if I followed the LFR Campaign Rules about that process. No change in magic items basically makes leveling up nonsensical for characters not near epic anyway.
I don't think that is a legal option any more. I think that was only allowed when the first Epic came out, because there was some concern about having enough P3 play to have enough Epic characters available to play. Now you have to make it at least to 21st level before you can level up to play a game.