MegaCAN is a tiny standalone CAN device which may be programmed to do anything you like.
Upload your program over UART using FTDI from Arduino IDE.
uC: ATMega168/328 @ 16 MHz
CAN controller: MCP2515 @ 16 MHz
CAN transceiver: MCP2561
Supply voltage: 5-30V
Possibilities are endless, limited only by your imagination.
Emulator to power up Audi A6 instrument cluster:
Other examples of usage and new ideas coming soon.