Old style navtec series 500 turnbuckle

I am looking for the center threaded bolt off the old navtec series 500 turnbuckles. The one with the nut in the center of it. I don't think they make them anymore and I am in need of one. Thanks in advance.

I'm told by a rigger that Hayn Marine is making Navteq parts:

http://www.hayn.com/marine/

Thanks to bebop for hooking us up with a replacement. Thanks D. Bartley for the lead on a new one.