There are 5 Beechcraft RC-45J 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.
N145J
1943 Beech RC-45J
Luttrell, TN
N40189
1943 Beech RC-45J
East Lansing, MI
N4207
1943 Beech RC-45J
Dallas, TX
N7032
1943 Beech RC-45J
Salinas, CA
N585PB
Beech RC-45J
Mukilteo, WA