Welcome back to the Community, @JulieStafford -
As of now, these are the options you have when it comes to email reminders. There is an "Order Prepared", but not anything as an additional reminder once the order is ready. 
What you're asking for would fall under the umbrella of Feature Requests. If you head over to our Ideate Board, you can search for an existing post to add your vote to. Anything requests that haven't been post, feel free to create a new one.
