Mike40
It is not possible to obtain the blanks unless you hold the registration.
This is done to protect the suite so that only the correct profile will fit the keyway.
You will have to obtain blanks from the locksmith that supplied the locks.
As he has not passed this over to you the rights to "your" profile belong to him/his company, he could if he wished fit the same profile locks to any other building that he wanted.
Could you not approach him and see if he will transfer this to the school?
You could also find out if he is a member of an association, and if so they may be able to help.
Mark