[paveltol]

Probably I can source and send you a used Dashhawk.
I am not sure Dashhawk can help with finding a clean Knock Retard signal - it displays multiple parameters at the same time. Also user can adjust the quantity and type of these parameters displayed.

The only thing I can think of now is as follows: Dashhawk allows you to adjust visual and sound alerts for the parameters displayed, so you can probably connect to sound alert. But the alert frequency and volume are not progressive with the growfth of Knock Retard. And the user will have to set only one alert for KR so that the system would not trigger because of any other alert.