So it looks like this?
PO Contacts::ContactID = POs::ContactID
Quote Contacts::ContactID = Quotes::ContactID
If so, you can use this script for POs and adapt it slightly for Quotes:
Set Variable [$ContactID ; Value: Contacts::ContactID ]
Go to Layout [POs]
Enter Find Mode  //clear pause check box
Set Field [POs::ContactID ; $ContactID]
Set Error capture [on] //keeps "no records found" dialog from interrupting script when no records are found
Note: if you have a layout based on PO Contacts with a portal to POs that you want the user to go to, a very similar script that searches PO Contacts for the same contact ID can be set up.
Awesome, that did the trick. Thanks!