Most cable railings are built on-site with standard parts.Check out here for more cable railing designshttp://awoodrailing.com/2014/11/16/100s-of-deck-railing-ideas-designs/#cable
Hi Jenna - Thank you so much! The cable rail was through Atlantis Rail Systems.
http://www.atlantisrail.com/
Mountain Laurel Handrail
A3 Architects, Inc.