There are 3 Piper L-4A 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. The ones listed here were built between 1946 and 1948.
N91MA
1948 Piper L-4A
Camano Island, WA
N87910
1946 Piper L-4A
Chalfont, PA
N4055S
Piper L-4A
New London, PA