Support for X509PKIPathv1 in xws-security for Spring-WS
Interesting problem you got there.
As far as I could tell with my Google-fu, there exists support for #X509PKIPathv1 in some projects (e.g., Oracle's XMLSec or Open SAML), however it is not widespread and even application like Soap UI don't support it for SOAP-WS.
Not only that, but other languages/frameworks have the same lack of support, like Delphi and .NET, IBM JRE.
What you could do, based on this SO and especially this SO is implementing your own WebServiceTemplate / WebServiceMessageSender.