There are plenty of threaded forks available... some really nice track specific ones too. You could switch to threadless if you wanted by getting a threadless fork, a new threadless headset, and a threadless stem, but theres not much point switching if you don't have to.
http://www.spicercycles.com/index.cg...&cat_desc=Road here is a really cheap one
http://www.spicercycles.com/index.cg...cat_desc=Track this one would be real nice though
http://www.spicercycles.com/index.cg...cat_desc=Track or even nicer, a cinelli fork

Edit:
http://www.spicercycles.com/index.cg...esc=Close-outs This looks like a damn good deal to me