Pretty sure George was looking for "close" replicas like M-TEC's or TTR400's.
Neither Moonpie's (pretty sure he is reselling Swarbrick's meggas, although Swarbricks new head pipes look pretty good) or Swarbrick's are close replicas and both take a serious amount of work to fit. Their price is somewhat better if you have the skills, equipment, and time to fit them and can settle for "similars" instead of replicas.