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They are available here:
https://www.teacherspayteachers.com/Product/Monstruos-de-Colores-Spanish-Color-Colour-Poster-Espanol-2683533
and here:
https://www.teacherspayteachers.com/Product/Monstruos-de-Colores-Spanish-Color-Colour-Flashcards-Espanol-2683466