Leaky shock-MGA

[Bob Gaughan <gaughan@mediaone.net>]

My right front shock.... er....damper on my '61 MGA 1600, leaks like a
sieve.

1.)  I read where auto transmission stop leak fluid solves the problem. 
Worth giving it a try?
2.)  It seems that it's not that complicated to replace.  Am I missing
something?
3.)  Is it worth getting a rebuilt one from Moss/Vicky Brit instead of a
new one?
4.)  Is it worth sending the old one back to Moss/Vicky Brit for credit?

Thanks, Bob Gaughan