No one knows. It's been a mystery for quite some time. I got my set from the QVC episode mentioned. As far as I know it was the only way they were available, but based on the text here perhaps they were available from DEI as well... having the set already I never looked there.
VERY slow trading due to health problems. Not transferrable so safe to trade with, just moving is painful and can't always access the cards.
Cardboard History My COMC
New Collection Website: Cardboard History Gallery (Still under construction)
Tips on how to make your scans look like the card does in hand (No more washed out, fuzzy scans!):