Hakeem, with 'information pack' you mean the author guidelines, I suppose. But what would you like to see in a 'sample manuscript'? Does it mean the structure of the paper? Often, the guidelines already ask the author to follow a certain structure of the content. Or do you mean templates for writing academic papers? That could lead editors to worry writers might plagiarize texts from the samples.
Nevertheless, both aspects are well presented in the literature as you can see following the links below.
Different fields of research require specific structures of their reports, see http://uncw.edu/ulc/documents/OrganizationofanAcademicPaper.pdf
Template writing of academic papers: http://gate.ac.uk/sale/dd/related-work/Academic+Writing+and+Publishing+-+A+Practical+Handbook.pdf