I'm having a great deal of trouble figuring out how to transform an object to bend a tubular portion to follow a profile.

I'm trying to make something that looks like the attached .stl

So far I've got the shape, but straight, as in the attached .3dm

How do I bend the conical portion of such an object to curve and take a 45-degree axial bend, while leaving the normal circular cross-section?

(MOI needs a manual so badly)