May be I'm missing something, it shouldn't be very hard to create a custom Ant task leveraging the wsconsume Ant task (http://jbws.dyndns.org/mediawiki/index.php?title=Wsconsume) that creates a jar with the obtained classes. Is this what WL's clientgen gives you or is there something else?
You are dead-on accurate. WL's clientgen provides a similar functionality. Can you send me a sample build.xml which leverages wsconsume Ant Task by taking the wsdl file as a parameter and creating a client-jar. My email is email@example.com