Clothes dont follow rigg

Sorry for my bad english, i m french.
i have a problem with clothes . ( i m on Unity 2018.3.6f1)

I have buy an avatar.
I created clothes for this avatar.
everything is set in humanoid rig.
If I import the avatar change with the clothes, it works well.
If i import the clothes alone, it's dont follow the bones avatar and remains in Tpose.

I had this problem with the avatar of Daz / Genesis. a script allowed to correct this but this script does not work on this new avatar. could someone please help me?

Sure, i can pay for help to fix that .
thank you.

The Daz Script

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using System.Linq;
5.  
6. public class Copy_Bones : MonoBehaviour {
7.  
8.     public GameObject SourceObject;
9.  
10.     // Use this for initialization
11.  
12.     void Start () {
13.         Copy();
14.     }
15.  
16.  
17.     void Copy()
18.     {
19.         if (SourceObject == null) return;
20.  
21.         var sourceRenderer = SourceObject.GetComponent<SkinnedMeshRenderer>();
22.         var targetRenderer = GetComponent<SkinnedMeshRenderer> ();
23.  
24.         if (sourceRenderer == null) return;
25.         if (targetRenderer == null) return;
26.  
27.         targetRenderer.bones =
28.             sourceRenderer.bones.Where(b => targetRenderer.bones.Any (t => t.name == b.name)).ToArray ();
29.     }
30. }
31.