I've never seen the proper tool in the shops here. Mind you, the attitude in this benighted country is that the whole bike is disposable. The industry is currently working on the belief that a flat tyre is grounds for changing bikes, their big problem being that they still want people to buy $2,000 wheels to replace the perfectly good wheels their bike came with. Most shops I've stalked out of after uttering heresy in the hearing of the 'sales staff' wouldn't even realise you CAN change chain rings, you change entire groupsets instead.

You think I'm joking don't you. HAH! There are reasons I'm as hard to get on with as I am and why I value the good shops that I find.