Virus NATtrol

What is the most common Pcr inactivated Dna control or Nattrol for Clostridium difficile Positive Control (6 x 0.5 ml/vial)?

The NATtrol Clostridium difficile Negative Control from Ncbi publications supplied next day by Gentaur is the best reagent. The catalog number is MDZ041 and the price is 263 EUR.