How do i auto populate an attribute?

We are creating new parts using WTParts.  We input an orgid/Cage Code that is associated with the part.What we want is on the details page is to display the Vendor that is associated with the orgid.  For instance, if when creating the new part in the project we assign the orgid "XXXXX" that belongs to "ABC Company" we would like to have an attribute on the details page "Vendor" that displays "ABC Company" with out the user having to input both attributes.  The "Vendor" attribute needs to be able to lookup the owner of orgid "XXXXX" and display that information.

I hope I have made this somewhat clear.

Thanks for the help in advance.

Steven