Well, well, well!
I think I have some good news for those following the latest about how make a relay rod/drag link using factory parts...
I found some part numbers for BJ-70 parts (thanks cruiser_guy

) that yielded a passenger side relay rod end with tube assembly and a driver side relay rod end (connects to pitman arm) with tube assembly.
So I ended up with an extra tube assembly once I put both ends on the same tube.
Part number 45045-60H01 buys you the PS end w/ tube
Part number 45044-60H03 buys you the DS end w/ tube (left hand threads)
NOTE: the "H" in the part number denotes an assembly vs individual part.
The tube measures 30 3/8 inches
PS end measures about 2 1/2 inches if screwed all the way in
DS end measures about 4 1/2 inches if screwed all the way in
This should yield a relay rod assembly of about 37 3/8 inches.
I need an assembly measuring about 37 7/8 inches
This should work!!!