[Zope] looking for XML-RPC client for C++ (urgh - but I need it)

We are involved in a project where a another company developes software written in C++ (it's their preference) that has to access data from our Zope server via XML.. I've checked out xmlrpc.com and found lots of language bindings but none for C++ (I know its more difficult to implement because of it's static nature) and one for COM. My question: Does there exist a plain C++ implementation for an XMLRPC **Client** ? thanks phil