What is the most commonly used Pcr inactivated Dna control or Nattrol for C. difficile Positive Control (6 x 0.25 ml/vial)?

The NATtrol Clostridium difficile Positive Control from Zeptometrix Inc. supplied next day by Genprice is the best reagent! The catalog number is NATCDI-6MC and the price is 255 EUR.