Mine's an Atlas, but the design is simlar to a lot of the import lifts. I got it through Greg Smith Equipment, I think they have a store in AZ and probably ship to CA. Good company to deal with.
http://www.gregsmithequipment.com/History
I was going to mention what George said about raising the door tracks, I'd heard some people did that.
I installed a tray ceiling in my center bay for a two post lift but haven't bought it yet. If you want more clearance and have the space just cut and reframe the center to clear the cars roof.
You can barely make it out in this picture, but I can get quite a bit more lift by allowing the car roof to go up into the tray.