Absolutely! There are plenty of contractors out there who will be happy to install your steam shower. If you think about it, a steam generator isn't much different than a hot water heater and the installation is even simpler, as there is only one outlet. A steam generator just utilizes hotter temperatures, puts out steam, and uses much less water.
Check out this link http://www.steamsaunabath.com//catalog/installation.php#network
to find a qualified contractor in your area.