Complex sentence: Full downloads of the past few episodes (minus commercials) are available to download on the official site also a boxset is available to buy which contains all the episodes (with extras) on a DVD and a signed letter from the hosts.
Split into simpler sentences: Full downloads of the past few episodes (minus commercials) are available to download on the official site. A boxset is also available for purchase, containing all past episodes (with extras) on a DVD and a signed letter from the hosts.