Johannus offers many choices in what are called their 'church organ' series. Every one of these instruments uses external audio only and is able to be ordered as a digital-only console and also as a digital-pipe hybrid.
There are five models in the Ecclesia family. These instruments can be voiced to serve smaller chapels and sanctuaries as well as the largest cathedral. Many options are available in choices of sounds, cabinet style, keyboards, music racks, benches and more so you may design the perfect organ for your setting.
Johannus' American Classic is a stand alone model. It is a very large three manual organ whose sound and cabinet will remind you of the grand instruments of American's past.
Here is a link to Johannus' Church Organ product page: http://www.johannus-us.com/products/