One thing that may work:
1.-You create a part (a cube, cilinder, whatever you want) and you place it into the library.
2.-Once it is created, you go to the folder where it is stored the *.prt file of this new part. (usually ...in team/shared...) and you delete de prt file or you move it to a different folder
3.-You go to the manage library, click on this part and do a recconnect file, chosing the *.prt that the costumer sent you.
Maybe it will work
Regards