Local Ubuntu Repo?

Pardon me if this is off-topic . . .

I'm trying to mirror an ubuntu repo and have been successful mirrirong the
ubuntu packages using apt-mirror. What I can't seem to mirror are the many
files under debian-installer & installer-amd64 that foreman needs for tftp
booting, etc.

Anyone out there found a way to mirror these portions of an ubuntu repo?

Thanks a lot,
Guy Matz