Since Studio Store Visualizer 14.1, there is a new download available on http://mysoftware.esko.com called 'Store Visualizer Sample Store – Big Stores' (Mac and Windows).
Clicking the link will start to download a ZIP archive Big_stores.zip. This archive consists of three new larger generic store environments that you can use as a template to start from after installation.
To install these three new environment templates, you don't have to unzip this package. Simply use the new auto-install feature of Store Visualizer 14.1:
Click File > New.
Right click in the left list pane (Template folders) and select Install package.
Point it to the ZIP file you downloaded.
New environments will be automatically installed into the right folders and will appear in the New project template list.