We are currently renewing one script with integrated cms with self installer, that is a one page template wich is fully customizable, as it might work as a coming soon page, and then add the other sections, like about us section, services, google map, subscribe area, contact form.
But it wasn’t accepted by CodeCanyon reviewers, but if you have interest, you can visit here:
FrontEnd: http://ezcode.pt/tests/fly/
BackEnd: http://ezcode.pt/tests/fly/backoffice/
We are currently working on adding parallax images on all sections, and planning to get a portfolio section on it.