You can find inline css prebuild layouts strcture file ( named like *-inline.html format ) in every theme folder.
You can download Mailchimp version email page.
You can download CampaignMonitor version email page.
The template pages are in the [html] folder.
All images are in the images folder. For each layout you get prebuild different html layout files and diffrent structure file and one all moduls in one pages:
The PSD files and PNG files are in the [psd_png] folder.
All PSD files and PNG files are in the folder.