with the $ rate so good at the moment makes them a little more affordable, but still an expecive option http://www.plxdevices.com/
less than £130 is not bad i reckon!
i'd deffo get one if they did a 80mm speedometer
indeed. that seems a good price for what they do. if you look at some of the other brands like Defi you can easily spend more than that per gauge, and they only perform 1 function