Add File delivery method to Woo Commerce

I need a function added to WooCommerce on one of my sites. When the status is set to complete, I need several fields to add linked files (not an ftp upload, but a linked file hosted on S3 or dropbox, etc.) This field needs to be in the client e-mail that gets sent when the order is complete. This field also needs to be listed on each order that's accessed through the user's "my-account". It should be in added to the product details here once the status is changed and the file is added. I need this to be able to handle multiple fields. I'm not sure if that best done with a "plus" to keep adding as many fields as needed, or if it's best to just have a fixed number of fields that's enough for our needs. I can see needing to send six files at once to the client when the order is complete. I also would like a simple document created outlining what changes were made and to which files. This is for us to be able to back up that document in case another developer ever had to make a future mod to the same files. I would like all the additional code to have full commenting in the PHP files to help this as well. I also had another woo commerce modification completed recently that I want removed. The mod integrated WooCommerce and WP-Client and should be removed since this method will accomplish the same thing, but much simpler for our users. I also want the plugin "WP-Client" installed and deleted.