I don't know of any company that makes a narrow hip 427 Cobra. There was a very cool non
oil cooler Kirkham for sale a few years ago. It was a beautiful street version.
Here's a narrow hip Cobra that a member was kind enough to let me drive.
Here's a Kirkham street Cobra that is a coilover small block. I think this car is beautiful.
The Canepa Cobra isn't a narrow hip.