This functionality is available in versions of FocalPoint from 5.2 onwards and can be enabled in the users web preferences on the FocalPoint website as follows:
Log into the FocalPoint website as normal
In the top right, click your name and select Preferences
Scroll down to the Invoice Register section
Select the Show PIR Search check box.
At the top, click Save
Log out and back into the FocalPoint site and the option PIR will now be available under Purchasing.