The MM cards also include card #99 Zorro. I believe #91-98 was reserved for the Wizard of Oz cards which have not been printed. The Mego Museum also did reprints of several cards with different backs.
Plaid Stallions goes up at least to #41 and there is a card #0 for Brick Mantooth
I don't know if this is a complete list of stickers, but these stickers exist:
Shadow the Super Horse
Oversized Western Poster
Jousting Knight (Red sheild)
Jousting Knight (White sheild)
DC Aquaman Shark
In addition, there are a few oversize cards / posters / postcards.
Plaid Stallions Stickers:
Other people have made cards for CIPSA Apes, Bullmark Apes, Action Jackson, AHI and Lincoln Monsters, Super Powers and Foreign Megos, but none of those series have as many cards as the MM and PS cards.
Nostalgia just ainít what it used to be.