I bought one for my Datsun 510 some time ago from Speedhut in the States for just over $200 plus post. It's an excellent quality tach with programmable shift lights an electro luminescent display. You can design your own face and decide what colours you want it in etc. It's also very slim. For another $30 you can buy one with a memory.
One other good thing is these will hook up to ANY ignition system.