I am plumbing the remote power steering reservoir on the '69 Coronet. It has the Tru-Track pulleys accessory drive, and the power steering plumbing kit comes with -6AN and -10 Braided stainless/Teflon hose and fittings, except for the power steering box outlet fitting? The stock fitting is machined with a recess in it for a spring.

Anyone know where I can get a -6AN fitting that works with the spring, or replaces it?
Or do I need to have a machine shop machine the inside of a fitting to make one work?