Edit /etc/rsyncd.conf:

<snip>
[Ubuntu-frozen-testing]
path = /srv/mirror/ubuntu-frozen-testing
comment = Ubuntu mirror
transfer logging = true
read only = true
timeout = 120
dont compress = *
	  

Put this in /etc/scaramanga/dists.d/ubuntu-frozen-production:

SCRIPT=ubuntu-frozen-production
	  

... and this in /etc/scaramanga/scripts.d/ubuntu-frozen-production:

#! /bin/bash

CONFFILE=/etc/scaramanga/scaramanga.conf
[ -f ${CONFFILE} ] && . ${CONFFILE}

DST=ubuntu-frozen-production

BASEDIR=${DESTPARENT}/${DST}

export GNUPGHOME=/var/lib/scaramanga/frozenmirror-keys/.gnupg

# From the debmirror docs:
#default rsync options are "-aIL --partial"

debmirror --verbose --source --host=localhost --method=rsync --root=:Ubuntu-frozen-testing --dist=lucid,lucid-updates,lucid-backports --section=main,restricted,universe,multiverse  --arch=amd64 --diff=use --rsync-options="-aIL --partial --no-motd" ${BASEDIR}
	  

(As you can see, this mirror updates from rsync://localhost:/Ubuntu-frozen-testing.)

Now when you are satisfied about your ubuntu-frozen-testing, you copy its contents to ubuntu-frozen-production with: