Edelbrock makes a kit, never used though-

http://www.summitracing.com/parts/edl-6593

Cyberdyne gauge only (Summit branded) $28 I have used these for decades.

http://www.summitracing.com/parts/sum-g2986-1

Autometer version ($80)

http://www.summitracing.com/parts/atm-5775


I have used this one on my GTX since the mid-90s (no longer available)

http://www.summitracing.com/parts/KNN-85-2437/

Car runs low 11's at 124 mph, all tuned with narrow band and timeslips.

Almost any narrow band sensor will do, if short on cash grab a handfull at the nearest pick and pull. They are dead simple devices that run low volts when lean (0V) and 1.0V when rich. The gauges are nothing but digital volt meters with a 0-1 volt scale.