title: NetSuite API search by externalId
body: <p>I am attempting to search for a NetSuite Vendor (which may or may not exist in NetSuite) with the NetSuite API; however, the only piece of information I have about the Vendor is the externalId.  My goal is to query NetSuite for the Vendor with the given externalId and if the Vendor exists, use it in a subsequent API call.  If the Vendor doesn't exist, I'll create it and use the vendor I've just created in the subsequent API call.<br>
  Despite my searches I have not been able to find a way to search NetSuite for a record by externalId (I've found many ways to search by a Field; however I haven't found a way to search by an Attribute i.e. externalId). 
  Any help is appreciated.</p>