Keith,
The parts referred to in the third paragraph in the left column on page 11-27 are B-52388 & 9, moulding (roof drip), R.H. and L.H. and B-52390 & 1, retainer (roof drip moulding), R.H. and L.H.. All four of those components are unique to sport coupes. The R.H. outer component, B-52388 is shown installed in the illustration at the bottom of page 11-25. The L.H. outer component, B-52388 is shown in the photo above of a sport coupe that still has its original fabric top covering (albeit in poor condition and covered with numerous coating of topping sealer. The inner retainers are not visible in any of the above photos as the visible mouldings snap over the inner retainers.
The contour of the standard coupe drip rails (rain channels) is the same as that of the sport coupe given that both body types use the same doors and therefore the door opening dimensions would be identical. If you purchased a pair of the reproduction standard coupe rain channels, they should serve as a good substitute. Obviously they would have be trimmed at the rear (extensively) and the front (slightly) to replicate those of a sport coupe.
Finding pairs of the original channels (mouldings) and retainers would require a minor miracle to occur and short of ordering engineering drawings of the part numbers cited above from the Benson Ford Research Center to make the four required pieces, the standard coupe reproductions are your best bet. The challenge will be their attachment above the doors over the finished top material as original. That function was served by the original retainers which were attached with wood screws through the top material into the underlying wood roof rail. Short of stud welding tacks to the back of the standard coupe reproductions, what I would likely do in your situation is to use a suitable waterproof glue to attach them.
Here's a side view photo of that sport coupe with the original top covering and drip moulding intact.