I think that Nito Dirt Drops have a width of about 52 at the ends. I believe that they were discontinued by Nito. You may have to get used or new old stock. I think that the Dirt Drop ends flair out a bit. I have several Nito 48 cm Noodles and I love them.
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1971 Raleigh International,1973 World Voyager, Mike Melton tourer, 1970's Gitane Tour de France, 1983 720 Trek, 1985 Paramount, 1990 Paramount, 1995 Merlin Road, Heron Road, Rivendell Atlantis