Knock Sensor Options

I had a question while reviewing the knock detection video. If you perform your own testing via external knock monitor and find that the OEM knock sensor isn't picking up knock that your can hear audibly, what are the options?

For instance, are there aftermarket knock control systems that can replace the OEM system that isn't doing its job so if as an example you get a bad tank of gas that knock can still be detected properly and make the necessary fuel/ignition adjustments?