How do I customize the templates used in the Members Directory plugin?

I would like to use a custom author.php file (or the like) to customize the output of /members/membername. It looks like this page is currently hard-coded in the members-directory.php file.

Is there a way to use a custom template for the member profile pages? We're adding custom fields, etc. to our member profiles, and this simple listing won't work for us.

I'm not sure if this ticket is public or not. The site is currently set up on a dev server, so I'd rather not show it to the public. I'm happy to send a URL privately.