Need to create custom email

Hi there, I really need some kind of plugin that allows me to create a custom email, this email will be an entry pass to an event, so it needs all the info the an invoice has on it, but be able to put ‘Entry Pass’ on it and the logo of the event.
I also need to be able to select this email from the dropdown and send to existing customers, can anyone recommend a plugin for this?
Thanks!