Again, not that i am aware of.  i thought it just replicated the supplier and lines automatically.  Happy to be proved wrong.

This my understanding as well: when duplicating a PO you cannot change the supplier. I am sure this is possible to build a specific development to manage this but I am no technical.

Subsequent to this, I found the follow articles in the KB

KB 77289 - Since PU8 and onward,  you can no longer update the supplier on copied PO

KB 47021- this article suggest you copy a PO and simply update the supplier.

It seems odd they would take away this functionality.