[Spacewalk-list] missing rpms for centos kickstart activationkeys

[rob morrien]

hello

i try to make a kickstart profile for centos 5.3

i get the next error

The following packages are not available in any of the channels associated
to this kickstart profile: pyOpenSSL, rhnlib, libxml2-python,
spacewalk-koan*. In order for all kickstart functionality to work
correctly, these packages should be present in at least one channel
associated to this profile.

where can i find them?