I need a seamstress to make minor adjustments to cotton/elastane garments

Information for the business: I sell children's clothing online Industry: Healthcare Details about the apparel: Children's bodysuits Content to include on the apparel: no content on the apparel needed Ideas for the visual style: pocket type opening Extra notes: I'm looking for a seamstress to do minor modifications for children's clothing. The modification is mostly creating a pocket like opening in the garments. I will provide the additional fabric but will need you to provide the interfacing fabric. The fabric is a stretchy cotton/elastane fabric and I will provide a similar example with measurements of what is needed.