lightening stock flywheel--sources?

[Craig Blome <cblome@yahoo.com>]

Does anyone have recs for companies that can lighten a
stock flywheel?  I'm about to have to swap gearboxes
on my '85 Corolla GT-S and may as well do the clutch
upgrade I'd been planning.  Given the potential
consequences of a flywheel going bang I'd like to find
the most reputable source I can to finish the thing. 
Is this a dumb idea?  Should I cough up the bucks for
an aftermarket flywheel instead?

Thanks,
Craig Blome