If anybody is looking for a circa 1992 Kona Impact (1") headset, I know where there is one. 75 euros.
https://www.mtb-news.de/forum/t/kona-impact-steuersatz-1-1-8.980360/
I am still looking for the same headset but 1 1/8".
https://www.mtb-news.de/forum/t/kona-impact-steuersatz-1-1-8.980360/
I am still looking for the same headset but 1 1/8".