You can get them complete for $2299 here:
http://www.hmotorsonline.com/shop/sc...age&item=30007
You would need an HASport or HCP mount kit in order to put it in a Civic. I believe you also need to adapt the H series cable shift linkage as well. As for an Integra, their engine bays are much more cramped, so space would be an issue with the larger H series engine.