Migrating Data from one Legal Entity to Another

One of the customers is creating new LE and BU in the system due to Organizational changes. I would like to understand how data can be migrated from one LE/BU to another? Below is the scenario:

Current Setup

LE 1 -> BU 1

To-be Setup

LE 2 -> BU 2

LE 3 -> BU 3

The customer would want to maintain the same setup as-in LE1/BU1 even in the new LE's i.e LE 2 and LE 3. However, the data that is currently available in LE 1 needs to be split between LE 2 and LE 3. Is there a way to transfer PR/PO/Supplier data from one LE/BU to another? Please let me know what is the best solution for achieving this requirement.