Well once you have the $600+ for those you will have a bit more money ( presumably ) not to go on eBay to find them.
Also bigger injectors will do nothing performance wise along with the clutch. I would get a tune before I did a clutch.
2001 ZX3 2.0L Zetec-
Hatch Nation #42
Going through Rebuild See "The TICK Build Thread" for details (http://www.focusfanatics.com/forum/showthread.php?t=289168&referrerid=62897)