I bought two of the Innovate LM-2 kits from summit. One O2 sensor on each kit gave out basically within 10 minutes of run time. I got frustrated with that kit and sent the last one back because of that issue. I bought a FAST kit but have not used it since purchasing it, so I can not say to the quality of that kit. When I was researching I could find no relatively cheap dual wide band O2 sensor.
Matt