If you want a gauge cluster with m.p.h., check
www.car-part.com or check ebay.
www.car-part.com is hooked up to almost every wrecking yard in the country that has a computerized inventory. You can find almost any part there. Many of them also list the mileage on the gauge, so you can get one close to your cars miles (or less miles, if you're dishonest). I use it regularly for finding parts. Usually the prices are listed also. Brett.