It's not too bad to get at. As said above the wipers and scuttle panel need to come off to get it. It's located on the passengers side and sits on top of the washer reservoir.
I found pushing down with one hand on the wiper to flatten the arm completely while pulling nearer to the base with the other hand helps it to come off. Due to the spring loaded nature of the wipers they aren't on the threads straight and pushing down on them makes them straight. On the other hand yours might come off easily.
The scuttle panel is held on underneath with several white clips, these twist to undo, but you need to lift a little lever on them first; also by a few clips at either end which just pull out.
I've researched for myself and it looks like you can get a motor for under £20. Joshydee off here will do you one for £18 posted.