Rex, I'd certainly go with that. I've used Central Wheel in the past and found them to be very understanding and sympathetic when things have not gone to perfection. Considering the number of variants and the half century and more from when these things were new, odd mistakes are to be expected. It is how the problems are remedied that counts.
Just looking at a spoke chart for early models, rigid and plunger frame, rear wheel with WM2-19 rim, crinkle hub, spokes listed are
Left Side Right Side
67-6008 Length 7 29/32" 67-6008 ditto 1949 A7, 1950 A7 A10
67-6017 Length 7 27/32" 67-6016 Length 7 29/32" 1951-1952 A7 A10
65-6303 Length 7 27/32" 65-6302 Length 7 29/32" 1953 A7,A10 Super Flash
Different part numbers for some reason for the same size spokes. No wonder one size is offered. From memory A,B,M share many cycle parts, hope this is of interest.
Swarfy