Your search for "Droid Missile Platform 424" revealed the following:
Aile Strike Gundam (SC01 Reprint) - ST04-001 - Legend Rare from Deck Build Box Freedom Ascension, available at 401 Games Canada. Rarity: Legend Rare Finish: Foil Artist: Soezy
Gundam Barbatos 4th Form (SC01 Reprint) - ST05-001 - Legend Rare from Deck Build Box Freedom Ascension, available at 401 Games Canada. Rarity: Legend Rare Finish: Foil Artist: Naochika Morishita
Gundam Hajiroboshi (2nd Form) (SC01 Reprint) - GD03-055 - Rare from Deck Build Box Freedom Ascension, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: sakusaku sakurai