Are you looking to buy a finished one or create a new one? I found this company
http://www.id4motion.com/ at SEMA and they told me it would be around 20K for one of their clusters. I might be naive but I would think someone with the right knowledge could take a small monitor, a Rasberry Pi and create the same thing. There are some people creating CAN-Bus adapters using Arduino.
http://nolandeng.com/rs11.php
http://www.openhardwarehub.com/proje...-OBD-Gas-Gauge
http://www.xsimulator.net/community/...l-gauges.3278/