Manual focus but auto exposure lenses for Nikon D40

I'm looking into prime lenses (50mm or so) for a D40. The AF-S lens
that works with the D40 is a little expensive. I don't mind having to
manually focus AF lenses, but I find their focusing rings to be a
little thin and loose.

Are there any Manual focus lenses that have electronic aperture
control?

I have a Nikon AF Nikkor 50mm 1:1.8D.

I have to focus it manually on a D40 but the auto metering and apeture
control works normally.

It's very sharp - when I focus it correctly.

John