I have used the free pattterns from the maufactures web sites. Rarely do I use the suggested fabrics. I may follow the theme of the fabric .. if they are showing a batik ... I will make it in batik partially because I really like batiks.
I have found that trying to duplicate the fabrics from a manufactures pattern can be down right frustrating .... often one seller will not carry all of the group shown( or is sold out of one or two). So I don't even think about duplicating the fabrics shown anymore.