Purchase Order Audit Trail - part deux

Better to give a scenario than ask the question right away:

PO 12345 is created and at the time the suppliers purchasing site address was "X". The goods arrive, get received/delivered, the invoice is matched/paid and the PO is auto-closed.

Now the supplier's puchasing site address has changed (different street or city) so the supplier master was changed to reflect the new address as "Y". The site was not inactivated - information was changed.

Reprinting the PO or doing a front-end query on this PO shows the supplier address as "Y" - the new address.

Question - is there a way to retrieve purchasing information that was in effect at the time of the original purchase?