There are 4 Cessna 0-1A aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top.
N194TX
1951 Cessna 0-1A
Gainesville, TX
N211PP
1951 Cessna 0-1A
Pembroke Pines, FL
N4FS
Cessna 0-1A
South Naknek, AK
N53601
Cessna 0-1A
West Des Moines, IA