Agreed. Unless you have a source to get the AMG parts for dirt cheap, for all the expense and effort you will be lots of effort and money ahead to simply pick up a kit from Andy or Cass. Andy's stuff is sold through Mancini Racing, Cass' stuff is sold through Dr Diff.
FWIW, the Viper calipers are also made by Brembo. As are a number of performance rides like WRX, Supras, etc.