I am sure it can be added, it is just whatever all the parts will cost, there is a pump, lines and the lifters that go above the springs in the front. What it will cost I have no idea...
They do offer it. Whoever optioned the car initially didn't opt for it.you would think they offer it... I'm pretty sure it came on the Enzo back in 2003 so I know they've got the groundwork for one done to come from the factory