Mefi tuners

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Does anyone know of any good mefi tuners in washington state or even vancouver bc canada? I am stuck with a mefi equipped turn key engine with no way of tuning it. I really dont want to take the car to california if i can avoid it. Also how safe is a mefi system? Without a mass air or o2 sensors how does the ecm know if the motor is about to melt down? I know it has a knock sensor but simce it has a kenne bell supercharger im sure its sensitivity is programmed on the lower end as ive heard the harmonics of the blower can set a knock sensor off. Any help would be appreciated