Please discuss modding about Play club (プレイクラブ) here.

I have a question about changing pantyhose mods ( highheel mods) to normal pantyhose mods (flat foot pantyhose mods (Play clubs) ,can you please help
my methods like this :
I-first method : using another normal pantyhose mod
1. import fbx of highheel mods and another normal mods into blender
2. transform the mesh of highheel mods into the same as normal mods using "snap vertex" function of blender
(snap vertices of highheel mods into vertices position of normal mods
3.reimport the fbx back to unity3d
the problem is the foot mesh has too many vertices need to transform (about 450 each legs x2 = 900 ) so it takes much time
II-second method : trim the mesh from normal mods and combine with highheel mods
i cut the normal foot from another normal pantyhose mod and combine into highheel mods,
but with this method i have to reaasign the UV of "normal foot" to fit the UV of high heel mesh ) and also adjust the normal vector ,which require the same amount of work ( or even more)
if you have any way to do it faster ,please tell me
Thank you very much