PO attachments to Sales order (VA01/VA02)

Hi Experts,

Need you help again. I am trying to find the solution on how can we interface the documents (e.g. customer PO in PDF format) attached to sales order (Via services for object) to webportal?

I know how to attach the documents using GOS. But not through DMS. Even in any of these options, not sure where the attachments are stored and can extract it to pass on to webportl.

Kindly help. I have searched the forum and google, but did not find anything otherthan SAP DMS or GOS.

Thanks,

Ram.