If my being here helps you get back to film - then my time ain't been wasted!
For myself, I think I've had it with flm. Kodachrome's gone, so what would I gain? I think that digital has simply become too much the norm for me now, and there's no going back. But a huge, affordable (read cheap!) sensor for the F3 would be nice - if I can still get a diopter to suit my new eyes!
If you really want a film like digital camera and long for your F3, drop 500 bucks and find a clean used dcs 760.http://www.mir.com.my/rb/photography/companies/Kodak/index6.htm
Sure, it's just 6mpx, but processes well in ACR, it's ccd so is film like, doesn't like to go over 200 iso very easy, and weighs a lot, but is based on the F5 and a better camera than the F3, way, way better.
It's ancient in electronic terms, but focuses dead on, removable finder and lenses for this range are cheap.
It's not overly smooth like modern dslrs and digital files, sharp as a tack and a deep rich file.
Honestly everybody will diss it, but try it and I think you'll be surprised.
Can it do Kodachrome. Sure, but doing Kodachrome is easy. Crush the blacks, bump the sat, smooth the midtones, sharpen the shadows and you've got kodachrome.
It's also got a lot more lattitude than Kodachrome.