leaky master cylinder(s)

["Don Vierling" <Don.Vierling@stago-us.com>]

OK, so I get the MGB all back together and running, but now I have
hydraulic fluid leaking on my foot.  Originally, I thought it was from
the clutch MC, but closer examination reveals it is collecting and
dripping off the brake pedal return spring.  Any advice before I rebuild
the brake MC?  Do I need anything not included in the rebuild kit? 
Someone recently mentioned a rebuilt cylinder from Apple Hydraulics for
$125.  Anyone dealt with them?
Thanks,
Donny V
1978 MGB