You could get Winners Choice or Muzzy to make you strings. Either will do a good job. However, I would call you bow manufacturer and ask what string material they make their strings and cables out of. The reason is that the factory string material maybe the same or similiar as what is being made by Winners or Muzzy. The factory strings I am shooting are made of 450 and the cables S-4 which are fine for what I am doing. Once a string is shot in, including Winners and Muzzy it will perform fine. Most manufacturers have switched to something less stretch than fastflight. If you know your bows proper timing position any string creep(stretch) can be dealt with fairly easily.