How to find rpms for various distros?

[Donald Leslie {74279}]

I am running Suse and use apt-get for rpm or Yast with the Suse 
repositories. I was asked for a
xdiif/mgdiff for rel4 .

I looked at www.rpmfind.net and found rpms for Suse 9.3 and PLD nothing 
foir RedHat .

I then tried www.fedoratracker.org . This is even worse it finds nothing 
for mgdiff. It actually found nothing for vi or vim. It did find emacs ( 
Do I sense a bias here?).

Where should one look for the latest stuff for red hat

Don