'98 Honda Prelude clutch master cylinder 26.16USD.
http://www.nopionline.com/nopistore/...1&vTitle=HONDA Prelude 1998

Remove the old one, bench bleed the new one, install, bleed the sytem, and you're set.

I'm replacing all the clutch hydraulics this weekend if the f'in parts get here in time (should). I purchased the master and slave cylinder for ~60USD and a SS hose that runs from the master to the slave for ~18USD.