I dont think they are (
technically) allowed to swap the wheels around from different cars. If they do then you are supposed to declare it with your insurance as being modified.
I know its stupid but they will try and jip you if you ever came to claim they will say "it isnt the same model that was built at the factory, and is therefore modified"
I am getting the window tints done as soon as it arrives (which i will also have to declare to my insurance). Its costing £200, which is not as good as the £69 from factory build but it means i only have to wait 1-2 weeks instead of 4 months