There are lots of "normal" long lenses for the Speed Graphic. They're usually around 162mm and in Graflex Optar shutters. If you have the Kalart rangefinder, you can find online the details of how to reset it. I don't know why anyone would need the Aero-Ektar unless focusing on the ground glass. Of course, you can get barrel lenses and use them with the focal plane shutter.
juan