Forcing two-sided when importing fbx

I am importing a mesh that is an export from Cyclone 3DR.

I am having some issue with the normal that Cyclone 3DR calculate, therefore, some surface are visible in the wrong direction.

So, if I switch all the material to be “two-sided”, this resolve my issue.

The problems is that there is a very long list of material created, and doing the change to go “two-sided” is pretty long.
I would like to automatically have all the materials to be “two-sided”.

Also, for now I am doing the importation manully, but eventually it should be a c++ class that will manage the imporation of the fbx, since I need this to de bone in runtime.
So, if a soluation existe in c++ to import .fbx in runtime and that I would have to control on creating material with “two-sided” set TRUE, this would be nice!

Thanks for your help!
Is there a way to do so ?