Your search for "Plains 545" revealed the following:
Plains (545) - Jumpstart Lands (Foil) (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Lius Lasahido Card Text: Foil Jumpstart Lands
Plains - Commander Deck (504) (CMR) from Commander Legends, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Noah Bradley