{Stus-List} leaky seacock- in water repair??

[danielmc]

I have looked through the internet but can't seem to find a  
solution-- perhaps there isn't one.   I have a slow leak in the  
seacock under the galley sink.  It appears to be original equipment  
on my 1980 C&C 25- brass ball valve type.  It appears to be leaking  
from the valve itself and not the base.  Any ideas for a temporary  
fix without a haul?  I would love to buy some time and replace this  
winter.

Thanks,

Dan