I need a mock up of a 3D model of 3 characters in natural settings

Information for the business: Children's characters
Industry: Art and Design
Design details: I need to get 3D mock up of some existing characters made and put into a lovely background design for a publishing pitch by Sat 29th March. I need a Cat, a wolf and a spider loosely based on the existing prototypes at this website address: www.chopsiemates.com
I am mocking up a visual for a children's book. I am pitching to a major publisher and want to get them excited about the look and feel of the characters.
Target audience: 2 - 5 year olds
Ideas for the visual style: Very organic and natural but quirky
Things to avoid: No plastic or anything overly manufactured looking
Preferred colors: natural colours - please see the existing ebook which can be downloaded from any ebook store - just search for 'Chopsiemates'
Urls to draw inspiration from: www.chopsiemates.com
Extra notes: The characters need to look like real 3D characters (natural and organic as possible) and in natural settings (a Forest for Wolfgang the Wolf, a Stary night on a grassy hilltop for the Spider and a Parisian style dusk setting for the cat. I have attached an existing prototype for the cat and some other backgrounds I like for the wolf and the spider