There are 4 Starduster Too SA-300 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 1971 and 1973.
N34AJ
1973 Starduster Too SA-300
Bellingham, WA
N101TJ
1972 Starduster Too SA-300
Brigham City, UT
N3949
1971 Starduster Too SA-300
Turlock, CA
N107JC
Starduster Too SA-300
Corning, IA