Bind clothing mesh to a parent character skin / rig

CharacterMeshBind.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace PixelWizards.CharacterCustomizer
{
    /// <summary>
    /// attach this to the clothing GO you want to attach (the GO with the SkinnedMeshRenderer)
    /// drag the main character body you want to attach it to (the GO with the SkinnedMeshRenderer)
    /// the clothing rig must have been the same rig the character's body used. the body parts (transforms) must be named the same thing
    /// </summary>
    [ExecuteInEditMode]
    public class CharacterMeshBind : MonoBehaviour
    {
        public Transform characterRigRoot;      
        public SkinnedMeshRenderer baseCharacterMesh;   //the character's main body
        public SkinnedMeshRenderer clothingToAttach;    //the clothing you want to attach

        [ContextMenu("Bind Clothing to Character")]
        private void BindClothingToCharacter()
        {
            if (characterRigRoot != null)
            {
                CopyArmature();
            }
        }

        private void CopyArmature()
        {
            Debug.Log("CopyArmature()");
            Debug.Log("Finding bones in source body");
            Dictionary<string, Transform> bones = new Dictionary<string, Transform>(); //main body bones
            var characterRig = characterRigRoot.GetComponentsInChildren<Transform>();

            foreach (Transform bone in characterRig) //make a dict for easy transform lookup
            {
                Debug.Log("found bone: " + bone.name);
                bones[bone.name] = bone;
            }

            List<Transform> replacementBones = new List<Transform>(); //this will hold
            Debug.Log("map to bones in clothing mesh");
            foreach (Transform bone in clothingToAttach.bones)
            {
                if (bones.ContainsKey(bone.name))
                {
                    Debug.Log("Bone match: " + bone.name);
                    replacementBones.Add(bones[bone.name]);
                }
                else
                {
                    Debug.Log("bone " + bone.name + " not found?");
                }
            }
            clothingToAttach.bones = replacementBones.ToArray(); //convert the list to an array and assign
            clothingToAttach.transform.SetParent(characterRigRoot, false); //move the clothing over to the body GO
            clothingToAttach.rootBone = baseCharacterMesh.rootBone; //point it to the new root bone.
        }
    }
}