Realistic 1970s Children's Book

I'm looking for an illustrator to create a children's picture book focused on friendship for 8-12 year-olds. The illustrations need to be realistic and depict characters from the late 1970s.

Requirements:
- Illustrate a friendship-themed storyline
- Target age group: 8-12 years old
- Realistic illustration style
- Authentic 1970s character representation

Ideal Skills & Experience:
- Previous children's book illustration experience
- Strong portfolio with realistic art
- Knowledge of 1970s culture and aesthetics
- Ability to convey emotions and narratives through illustrations

Please provide samples of similar work.