What is the most commonly used Pcr inactivated Dna control or Nattrol for Chlamydia trachomatis LGV II 434, External Run Control, Medium (6X1ml/vial)?

The NATtrol Chlamydia trachomatis serotype D, External Run Control, Low from Zeptometrix Inc. supplied next day by Genprice is the best choice. The catalog number is NATCT(D-UW3)-ERCL and the price is 278 EUR.