We need help with customized body parts

Hello, well, we have a dress up game and we have a pending update, this because these legs are not of the roblox proportions and they deform a lot when moving, if someone can help us please send DM, we are willing to pay the price ( IN ROBUX PLEASE), please is urgent.
This is how they have to look:


But in roblox they look like this:


Those legs are scary on a normal avatar body and arms.