Google, magnifying glass on flexiarm. Then hit images. Look at the hundreds if not thousands of pictures and pick some that look exactly what you are looking for and / or some that might (with a bit of imagination and adaption) suit your purposes.
Remember that magnifying glasses depend on the ratio (distance / positioning) between your eye, the glass and the object. Your head is near enough in a fixed position when you hoon your awesome steed, which might render the magnifying glass all but useless. Trial and error may well be your best friends as you experiment.
Do post pictures of your final creation.