Thanks to folks for your help. As mentioned, the original spokes were 2/1.65 butted. I was looking at D-Light because that's the exact dimension that they advertise, and I couldn't find any other spoke that was dimensionally conformal.
I emailed WheelBuilder.com and asked about D-Light spokes, which they don't stock. They indicated that they might be able to order a small (two wheel) quantity but possibly would have to order mass quantities. Thought those reading this would like to know that Wheelbuilder was willing to ask about this.
Originally Posted by
Dan Burkhart
... just a comment about the D light spokes. Nothing wrong with them, but just be aware that there is no room to shorten them if you get the length wrong. Spokes such as Sapim Race or DT Competition have a bit of room to shorten...
Good info from (an obvious!) expert. Thanks, Dan. This limitation may be why the spoke is not stocked.
One update: Upon looking at this, the DT Swiss site notes that the longest DT Swiss Competition spokes are 300mm
So the choices are:
DT Swiss Revolution (2.0/1.5mm, available up to 309 mm, and apparently have the same short swage distance as the D-Lights )
Sapim Race (2.0/1.8, 310mm)
Sapim D-Light (2.0/1.65, 310mm)
Sapim Laser (2.0/1.5), 310mm)
The Race and Competition are both 2.0/1.8 which I may just accept as close enough. I'm going out to the garage to pull the wheels and to carefully measure front, and rear DS/NDS lengths. Then I will order. BTW, Sapim Lasers are 2/1.5. Given the progress in steels and drawing technology, I'm guessing that would probably suffice especially given that I'm going to replicate the original 4-cross lacing. But its only about 35 grams difference (between the 1.8 and 1.5mm center section diameter).
I'm leaning towards the Revolution or Race, whichever is cheapest.
This is interesting.