FTP to Proxy With Attachment

Dear experts,

I need your help.

I need to build an interface with the following scenario:

> Search ZIP files on a FTP server (FTP Sender Communication Channel).

> Move the ZIP file into the inbound ABAP proxy (XI Receiver Communication Channel).

The partner does not want to use Java Mapping or Custom Modules. He also did not want to use the File to File scenario.

I need to do the ZIP file into the ABAP Proxy as an attachment.

I need that the ZIP file goes into the inbound ABAP proxy as an attachment.

It is possible to do this? Can you guide me?

Thank you.