I have one available now - $20 shipped and paypal-ed to lower 48 for anyone interested - just PM me.
I've installed the RJM clutch pedal - it allows you to adjust the clutch engagement point and the 'window' of engagement more precisely:
rjm clutch pedal
However, the century spring is a very cost effective alternative and does improve the feel of the clutch engagement but doesn't have the adjust-ability features of the RJM clutch pedal.