Oh, I got it through a mission in the World Abyss. Here's three other ways you can get it:
Client: Claydol
Objective: Take item from Yanmega.
Place: Miracle Sea B13F
Restrictions: None
Difficulty: *5 (500)
Reward: Sun Ribbon
Wonder Mail:
8 J 1 + J R % S J H % -
Q S X + K J # - 6 8 - 5
Client: Charmander
Objective: Take item from Garchomp.
Place: Blizzard Island 17F
Restrictions: None
Difficulty: *7 (1000)
Reward: Sun Ribbon + ?
Wonder Mail:
# M 9 H % K T % S C R S
9 K 5 X 7 J 5 M @ N + 3
Client: Skiploom
Objective: Search for Aipom.
Place: Surrounded Sea
Restrictions: None
Difficulty: *5 (500)
Reward: Sun Ribbon + ?
Wonder Mail:
7 C 8 W 3 0 8 R Y J 2 X
M @ & Q T Y S J % 3 = 9
https://www.neoseeker.com/resourcelink.html?rlid=166767&rid=154458 <All thanks to this website.
I don't think it's canceled, I think it's on a reaaaaally loooooong pause. ;)