Soap Call retrieving document from FTP Server

Hi

I have a specific scenario I need help with.

I need to be able to return a PDF document as an attachment from a SOAP call. This part is simple as we know SOAP supports attachments.

My problem is actually retrieving the document. The web service call will provide me with the name of the document and I have to retrieve it from a FTP server. The only way I can do this is with the FILE/FTP Sender Adapter and I don't think this is possible.

Any suggestions to do this without using BPM?

Regards

Rob Warde