The cards were mostly available with the first pressings of CDs - I didn't start collecting till after most had already been released so I only have Mana's card and a few of the
neo cards. I do have reprints of a couple of cards that were included with the LE versions of the original anime series DVDs (
Asuna,
Konoka,
Nodoka's botched card plus the
anime-style mockups included with
later volumes) and those
plastic cards mentioned earlier.