How do I clone a custom wordpress page?

I am looking to add a new page to our website and would like to use the same layout, functionality as a custom page that was created by an outside developer. Is there a way that I can do this without reenlisting the help of an outside development company?

The layout I would like to use is from this page

and I have granted access so that you can take a look at the CMS.

Any help or guidance you can provide will be greatly appreciated.

Thank you.