Could I get a lens hood that suits 'all' lenses?

A fixed universal lens hood would not work.

The hood is designed to block light that is just out of shot. Such light can't contribute to the image in any way but can bounce around inside the lens and cause flare.

What is "just out of shot" depends entirely on how wide your lens is. Light that is just out of shot for a 300mm image will be mid frame in an 18mm image! So blocking this light will leave big black areas in your images.

You need a hood which changes shape somehow. The easiest way to achieve this is with "barn door" style flaps which can be angled to stay out of shot:

_{(source: photo.net)}

http://www.dvxuser6.com/uploaded/8104/1156192102.jpg

The simplest and most universal method i know is: use your hand or a nearby object (tree, lamp post, building) to cast a shadow on the front of your lens.

This allows you to not have to carry or even own a lens hood (this also works for all your lenses)

Of course this might not be very practical for some kinds of shots where you have to be in a semi-fixed position, but for general walkaround shooting, it's great.

NO

On the contrary. It is advisable using different hoods on the same super-zoom lens for different focal length. Usually the original lens hood for such lenses are ok on the short end of the zoom area. That has the shape of an ultra wide angle lens hood. In the mid of the zoom area and especially near the far edge (long focal length) this lens hood is far less than optimal.

Lens hoods are designed according to the lens design and the lens filter diameter. For example, you can't use the same hood for both Canon 50mm 1.8 and Canon 100mm 1.8, because the first one has filter diameter 58mm and the other one 67mm. So here one hood would not be compatible for both lenses. The other thing to consider is the lens design - manufacturers design different hoods for different kinds of lenses. A wide angle, for example, would not be able to have a cylindrical hood, but a flower one. A cylindrical hood in this case will result to have hood parts in your photos. Here is a video where you can find all you need to know about hoods: http://www.youtube.com/watch?v=B_m0MfAjNsk.

Hope this helps!

One thing long forgotten apparently is that there are flexible lenshoods, basically rubber tubes that can be extended to different lengths.
While far from universal (and not designed for the purpose, they're designed for things like pressing against a window to reduce reflections), they can work for different lenses with similar but different focal lengths.

Of course you'd still have the problem of the hood not working on lenses with variable front element diameter.