Your search for "EX Base EXB-003" revealed the following:
EX Base (EXB-003) - EXB-003 - Common from ST-10 Starter Deck: Generation Pulse, available at 401 Games Canada. Rarity: Common Finish: Normal Card Text:(At the start of the game, place 1 active EX Base as your shield area's base.)
EX Base (EXBP-003) (Gundam Base Pop-Up World Tour) - EXBP-003 - Promo from Gundam Promotional EX Base Tokens, available at 401 Games Canada. Rarity: Promo Finish: Normal Card Text:(At the start of the game, place 1 active EX Base as...
EX Base (EXB-002) (C+) (Alternate Art) - EXB-002 - Common+ from ST-09 Starter Deck: Destiny Ignition, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: MOROTYAN!! / Yosuke Adachi / Kazumasa Yasukuni Card Text:(At the start of the game,...
EX Base (BETA) - EXB-001 - Common from GD01: Edition Beta, available at 401 Games Canada. Rarity: Common Finish: Normal Card Text:(At the start of the game, place 1 active EX Base as your shield area's base.)
EX Base (Block 1) - EXB-001 - Common from GD-01 Booster Pack: Newtype Rising, available at 401 Games Canada. Rarity: Common Finish: Normal Card Text:(At the start of the game, place 1 active EX Base into your shield area.)
EX Resource (EXRP-003) (Bandai Card Games Fest 25-26) - EXRP-003 - Promo from Gundam Promotional EX Resource Tokens, available at 401 Games Canada. Rarity: Promo Finish: Foil Artist: Misa Matoki Card Text:(At the start of the game, the second-turn player...