Some models are missing some parts

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Hello

I'm 3D Artist and lately I tried to port Witcher 3 models into blender and I approached a problem
I noticed that some models are missing some parts. In this example Imlerith is missing his gloves and half of his belt
Does anyone know how to fix this? I'd be grateful
Used W3Oven with newest Witcher from Gog
Missing parts.png
 
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