JQuery :: Append Mailto Link To Orphan Plain Text Email Address

I have a div that contains simple text data with line breaks. I want to append a mailto link to the email address but so far I have not been able to select the email.

The container looks something like this:

My first intention was to use a filter like:

But I found out that I couldn't apply it since the container had no children. So I used a function first to wrap the elements into span tags and then applied 'find':