Stefan,
There is no physical delivery of our extensions. They are all digital downloads that you can get from the My Subscriptions area, available in the login area in the top, or from the link below:
www.sourcecoast.com/my-subscriptions
The email you received from PayPal is their standard email and there's, unfortunately, no way to customize it.
Hope that explains, but if you run into issues or have other questions, just let us know!
Alex