Justin,
Did you see this thread on the forum explaining how to perform a soap ws call with a custom java action? It might be helpful in getting the result you need.
I by adding saaj-impl-1.3.25.jar to /userlib and then updating my Spring configuration to use this specific implementation
<bean id="saajMessageFactory" class="org.springframework.ws.soap.saaj.SaajSoapMessageFactory">
<property name="messageFactory">
<bean class="com.sun.xml.messaging.saaj.soap.ver1_1.SOAPMessageFactory1_1Impl" />
</property>
</bean>