you don't have to make the quilt exactly - it can be a sampler.
the author of the Dear Jane Book has never made the entire quilt, she only does samplers of the original quilt made by jane.
whenever some one make a quilt based on the original it is called a Baby Jane, regardless if its 100% accurate or a sampler.
you can use reproduction fabrics or any fabrics that suit your tastes - its your Baby Jane and you can make all the design decisions.