mixing mock and live services

Hi,

Does anyone have any suggestions or advice about mixing mock and live services? What I need to do is have a mock of a wsdl, but some of the services a available as 'live services' in that SOME of the functions represented by the WSDL are written and can be run from a server, but others I simply want to mock with soapUI for now.

It would be time costly to have different end points using something like a different port for the live and mock services, as the client application is designed to you the one service URL/end point.

thanks for any suggestions...