I've got a Graflex 4X5 Series D with a f/4.5, 7 1/2" Kodak Anastigmat. I'm looking for a faster lens that would be more suitable for handheld portraits and street photography. Since the camera has a FP shutter barrel lenses are fine. I'm not to scared about cobbling up a way to mount a lens. The main thing is having enough back focal length to clear the mirror. I've got an Aero Ektar (that I bought about 40 years ago for $17!) that doesn't quite allow focusing beyond a few feet. Any suggestions?

Oh, and, of course, I'd like to pay $17 for it as well

Allan