Current transformer with high ratio

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I'm looking for a current transformer which can take down 40 A rms down to 1-10mA for further transportation in to +-10 V high impedance input. The input is a National Instruments input module. The purpose is to sample the waveform of the current. Most transformers will give me 1 or 5 A out. I'm interested in mA's.

Any clues how to take in an unsulated current signal into a measurement system?
 
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