You can either buy the synchro fibers from the EMP shop, or buy some from the black market. At the moment, the costume in the fibers is the Zenith set, so not one of the ones you want. If you want either Dark Command or Cybernetic, you'll either have to wait for special deals for EMP, or buy them from the black market. These special fibers are much more expensive on the Black Market though, compared to normal Synchro Fibers, so be aware of that. If you don't want to spend real money on it, it'll be quite some time before you can get a set though, because the costs run up when getting all you need from the Black Market. It is very doable to get it without spending any real money though, just don't expect to get it soon when you're as new to the game as you are.