Template Creator allows you to replace the bundle page's default template with your own custom template. This will override the existing template and take full control of the bundle page as a result.
You can find the Template Creator in the Bundle Builder app by heading to Settings → Template Creator.
At this time, we are unable to provide replicas of the default template.
See the Custom Changes guide for a list of developers and specialists who may be able to help you create custom templates from scratch:
In case of deletion, or any changes made to the default template, you can repair this by deleting the code, saving the page and then refreshing your browser. This should restore the default template.