Is anyone aware of a vendor selling repro big block bypass hose nipples that are correct for 65-66, and 67 before they added the bulge or lip to the end?  (I think that lip was added somewhere around May of 67.)  
It is basically just a straight pipe, no threads, no lip.  I can only find this style with the lip:  
https://www.ebay.com/itm/375500603824
If no one is making the 65-67E version, does anyone happen to know the specs of the pipe they used (O.D. size, and wall thickness)?  Maybe I can just buy some pipe at the plumbing store and cut out my own.
Thanks!