The only group I know of that did ZZ Gundam was AnimeSkyScraper. But, idk if their site or torrents are up anymore. Check www.torrentspy.com

EDIT: ok, it looks like this is the only torrent up for ZZ:

http://ts.searching.com/torrent/5191...ete_Collection

Its a 10.5 GB torrent, so make sure you got space first.