childrens' book illustration done in 1950s style, pastels, some detailed, some sketch level quality

I'm looking for an experienced and creative illustrator to take on a project that requires illustrations for a children's book. Specifically, these illustrations should be done in a 1950s style, using pastels, with some more detailed and some at a sketch level quality. The target audience for my book is 4-7 year olds, with less than 10 illustrations required. I have a general idea of the theme and color scheme but am open to suggestions from the illustrator. This is a one off job and not part of a series, and the successful candidate will need to produce all illustrations in a timely manner to the highest standards. I'm looking for an illustrator who is passionate about their work, has an eye for detail and a creative flair for design. If this is you, please send me your portfolio. A couple of sample images for style attached.