Installation:

1: Install this mod:
https://www.gta5-mods.com/vehicles/canis-mesa-add-on 

2: Extract "mesar_livery2.yft"

3: Using OpenIV with Edit Mode enabled, add it to "E:\SteamLibrary\steamapps\common\Grand Theft Auto V\mods\update\x64\dlcpacks\mesar\dlc.rpf\x64\mesar_mods.rpf\" 