Need an web-based, client-side FTP component

I'm hoping someone can point me to a component that is already written, write one for me for a fee, or help me to write one myself also for a fee.  Here is what I need:

I need a client-side component to take the list of files and FTP them to our FTP server into a path we specify.

As easy as that sounds, I've not been able to find a component that I can purchase that will upload FROM A CLIENT'S machine to us. There are an unlimited number of components out there that FTP from the web server to an FTP server but that is not what I need.

The interface for the client to choose what files to upload is done.  You can see a public mock-up at http://www.craftconn.com/temp/writeModule.asp.

Here how the interface will be used by the client:

1. The client will bring up the interface above in their browser (its served from our web server of course).

2. The image thumbnails on the left are a display of a particular directory on the client's machine. The client drag the images from the left to the desired category boxes on the right.

3. When finished dragging, the client hits the "Upload and Save" button which uploads the files to our server and does other stuff like updating the database.

The parts I have already:

Obviously, the interface is done - it works. The drag and drop works. From the drag and drop form, I have a list of the images that need to be uploaded and various other pieces of information to rename the file and update the database on the server side.

THE ONLY THING I'M MISSING is the FTP component that I can install on the Client's computer that will allow me to access their file system, get the images in the list specified by the existing interface and upload them to the server. I have a small group of client machines so we can install whatever component I need onto their systems.