I would suggest contacting The Third Hand directly. There may be certain things you need to be aware of,such as a specific headset, when getting the reducer. Probably best to get the headset and the reducer together. If they can't help you, check www.sheldonbrown.com/harris, they should be able to set you up. Sorry I can't offer more help on this one, but I've never used the reducers myself.

As far as the fork goes, do what you have to do to get back on the trail.