A shop that I have done business with before used to make custom nerf bars. The bars were really nice, I can only assume that they are still making them, it might be worth a call. Beware, their nerf bars are not cheap. Can run $200 and up depending upon custom work required. But very good quality and satisfaction usually guaranteed.

The company is Vintage Specialties located near Gettysburg PA.
http://www.vintagespecialties.net/

It is a family run business specializing in auto restorations and turnkey rods. John and Suzie Matthews are the owners.