If you're looking for something cheaper and a bit more custom, I know member SRS built a digital tacho from a kit and mounted it in the console - looks pretty
d@mn good, even included a simple battery volt meter. The same company does speedometer kits that work off a magnet & sensor mounted on your front wheel. Only problems I can see is you'd the odometer/trip meter, and the kit's done in KPH, doesn't say anything about a MPH mode.
Digital Speedo kit Digital Tacho kit If you ask him nicely, SRS might upload a pic of his tacho mounted in the console.

Matt