I just called my LBS today about this same issue. I have a Giant Cypress and they told me I can get a Chro-Moly Fork for $50 and $25 Labor. For $75 bucks that's not a bad deal. My fork is threaded so this is just for a threaded chro-moly fork so I wouldn't have to change out my headset and stem. Give your LBS a call who sells treks.