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analog divider circuit for low voltages


I need to divide two voltages of ~40mV and 2-5mV.  I wanted to use something like the AD632 divider circuit but from the datasheet it does not look like it can divide voltages of this size. Do you have another product that can do the same thing with this level of voltages?

The output will be the input to a lock in amplifier so I don't really want to amplify the signals before dividing.  I also was looking at ADCs but don't think I want to digitize the signal before inputing it to the lock in, also most of the ADC also seem to expect larger numbers.

Does anyone have any idea how I can do this?

Thank you for your help.