As part of the 25 Days of Pogo Celebration (https://www.pogocheats.net/forum/index.php/topic,53519.0.html), Pogo has re-released 50 previously-retired Gingerbread badges.
You can pick them up in Challenge Central for 16 gems each.
To find these badges easier, sort by "Mix n Match" and "Release Date: New to old".
These badges will be available through December 7th.
https://www.pogo.com/challenges?filters=MNM%2CUNOWNED&sort=RELEASE_DATE_REVERSED
For a "Back from the Vault" sale, the price is a bit high.