They probably don't really have any clear answers, catspj! You should read all of the misinformation on their facebook page and on other sales threads about this very same question--buying extra cover on the eBay satchels. There are some very frustrated people out there still searching for an answer, and just being told they have to use their own box/packaging, and pay $2.95 as well as $1.50 for first $100 of cover etc.

AusPost should be employing you as a phone rep, or similar, as you are willing to share your knowledge and take the time to explain it properly 🙂