I believe it was from a contest months ago from Digital Leisure, wich is assumably well over, the other option is it was an ISE hack (pathetic) in wich case it's still unobtainable. Perhaps it will be available in due time though.
Only one user has the suit legitamately via a contest Digital Leisure held. Everyone else with it has hacked it via ISE. You saw it hanging in his penthouse because anybody that owns digital leisure clothing has them hang in the penthouse closet automatically.