How to select page template for fundraiser?

How can I select (or create) the theme template used for the fundraiser/project pages? Or, is there away to disable comments on fundraisers?

No actual pages appear to be created for /projects or /projects/{The Fundraiser's Name} yet the comments section and sidebar appear. My theme has a full-width template I would prefer to use, and I would rather disable comments on certain fundraisers, but without a page to edit, I can't figure out how to do so.

The site will likely still be in pre-launch mode by the time I get a response but the link is http://tripawds.org (mapped to 501c3.tripawds.com)

Any tips or feedback are greatly appreciated. Thanks!