For all of those like me looking for an email that is only used for Recover Cart will be out of luck.
It uses the following 3 files to compile the HTML email:
1) store/email/email_template_default.html <= email template
2) store/admin/includes/languages/[the language your using]/recover_cart_sales.php <= email language file
3) store/admin/recover_cart_sales.php <= content layout of email
if your wanting to change the core layout of email e.g. all the actual 'content' of this email you'll need to battle your way through 3).
hope this helps someone else.
regards
Andy.



