You will probably have to add a washer and spread your rear triangle by about 2mm, but a SunTour Ultra-6 freewheel is a great option, and what I used when I repurposed my 1970 UO-8 as a commuter/beater.
I am with you on tubulars -- much as I liked them in the 1970s, I no longer have time or inclination to fool with stitching, sewing, and gluing.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069