Cercospora out of control

[Zhen_77]

Hi guys, some of my Nepenthes are affected with Cercospora and the thing is that the infection is spreading fast, damaging various leaves of the plant. Where I live, no one can advise me of any antifungal suitable for controlling the fungus...
Does anyone know if there is any website on the internet that sells a product that can keep the fungus at bay?

Thank you guys!