[Amps] LK-500ZB Bias parts

[mike stokes]

I am finally getting around to fixing my LK-500ZB.  The bias circuit blew
taking out the Relay and the Zener.  Anybody know the best place (price) to
buy a Zettler A820-2C-12DE Relay and a NTE5251A Zener diode or equivalents ?

Thanks

-- 
Mike Stokes
KK9V