Another way to look at it is the length of the steerer and headtube. The Impact I have worked fine with a Kona frame with an 11cm headtube and a 14.5cm long threaded steerer.
Hi @markoc - thanks for looking into this! Yes that second link definitely looks like my Kona.
The headset you have could certainly work though you can never seem to tell unless it's fitted on the bike. I wouldn't know how to fit it myself so would have to rely on the bike shop. If it is salvageable then I'm sure they would try and fit it..?