The two carriers look identical and could be modified to fit with suitable bracketry. If I remember correctly, the carrier that I had on my 1948 Scott back in the fifties, had a circular section about 2 1/2″ in diameter in the backplate which allowed the carrier to be rotated so that it could be set upright when the carrier was clamped to the frame tube. whether it was original or not, I don’t know as the bike was 7 years old when I acquired it. I have one in my garage which is for another Scott of mine. I’ll take a picture of it if you think it might help you in finding a similar one.