Ok, got your situation. The problem is that the headshok stems are a WAY oversized one, and I don't know if anybody makes a replacement in that size that isn't a suspended fork. it's a 1.5 inch steerer, and that makes finding a replacement tough. The other problem is that since it's got about 25mm of travel built into it, you have to find a stem that is going to measure out the same from the bottom of the head tube on the frame to the dropouts. Hopefully somebody with access to more resources than I will be able to find something that works, and will post it here.
Sorry I can't be of more help.
Steve W.
Whos grandfather was from Kifisia.