Wayfair, Walmart, Amazon, Urban Outfitters, Aliexpress
Everlasing Fabric for pic # 4
https://everlastingfabric.com/products/mixed-gingham-bedding-set-blue?variant=42909093167345
Amazon for pic #5
https://www.amazon.com/TOMYEUS-Bedding-Three-Piece-Four-Piece-Comforter/dp/B0B6R62SJT