Sweatshirts importer for sweatshirts - Baby Products

Hello, I opened my online store and am looking for a textile factory capable of producing an initial order: 500 blank sweatshirts for babies. 5 different sizes (from 3-6 months 24-36 months). 3 different colors ( black, pink , blue) Round neck elastic enough to let the head of a baby , medium thick, good quality. A mixed cotton-polyester I think? Non-toxic dye. Are you able to do this? Can you show me ? thank you, Best regards