Yes they do make a single switch plate with multiple buttons and a dimmer. <a style="text-decoration: none; color: black;" href="http://www.westsidewholesale.com/">Lutron Dimmer</a>
and wall plate from the Grafik Eye Series may be the best for this purpose. It can be a more expensive option. It is harder to use, looks nicer and takes a professional to install. The system can be used with or without a computer. <a style="text-decoration: none; color: black;" href="http://www.westsidewholesale.com/">Leviton Dimmers</a> can be a less expensive and easier to install option the model to look at is the Leviton X-10 series.