JRP AFR Digital Gauge 60mm
Can used in conjunction with the 14point7 Spartan 2 wideband
These gauges are really well lit and clear to read, you have the numeric readout in the middle, as well as the sweeping style display as a secondary which can be good to use with peripheral vision.
Change the colour between red or blue display and have a dim option.
The input supported by these AFR gauges is 0-5v which scales from 10 to 20 AFR to perfectly match the linear output from the Spartan 2.