I've done a custom dashboard or 2, and I've actually thought of recreating this one before. Can you find a video of how the speedometer moves? I'm curious, it looks like the numbers move down into the circle, and then out the bottom as you continue speeding up.
The biggest concern I have about this dashboard is the tachometer. Our current DashXL system doesn't have any way to "twist" a line like that. I could do 2 separate indicators, one for gear and one for RPM, but I don't think it could be exactly reproduced as it is on this dashboard.
Is your car going to be OBD-II compliant? If it is, you can pull most of this data from the OBD-II and it will be MUCH MUCH cheaper. Non-OBD compliance would force you to get external sensors, like the PLX Devices iMFD sensors -- which run ~$200 a piece.
If you're interested in talking about it more PM me.