Howdy Jerome,
I once wrote a very similar snippet to that: http://pastebin.com/J0XzSxTz
These snippets are very tricky to write, because it is not very snippetable. Ultimately a much better solution is to write a custom template for WooCommerce, since all of those emails are generated by WooCommerce. Woo makes this pretty easy, even in the Woo > Settings > Email panels they list all of the emails they send, and show you where to find the template files for each. From there you can override it with extra data like in the snippet.
I realize that this is just an overview of what to do. Unfortunately this customization is going to be a bit involved, and require a fair bit of code that will need to be written.
Does that answer your question? Do you have any followups? Please let me know.
Cheers!
– Brook