The Aero Commander 100 began life as a three-seat design from Volaircraft of Aliquippa, Pennsylvania in the USA. The basic design was known as the Model 10 Volaire and flew for the first time during 1960. Features included a high wing, 360° all round visibility and metal construction. A handful of production aircraft, the Volaire 1035 powered by a 100kW (135hp) O-290-D and the four seat 110kW (150hp) O-320 powered Volaire 1050, were built before Aero Commander purchased the design and manufacturing rights for both on July 12 1965. Reference
http://www.airliners.net/info/stats.main?id=341
The Type Certificate Data Sheet NO. is (1A21).
Go back to the FAA web site and type in the TCDS number 1A21 the model you are look for is (Aero Commander) 100.
The T/C holder is:
Dynac Aerospace Corporation
672 South Washington St.
Afton, Wyoming 83110
NOTE X. Christen Industries, Inc., P. O. Box 547, Afton, Wyoming 83110, is licensed by Dynac Aerospace Corporation to manufacture and obtain airworthiness certificates for Models 100, 100A, and 100-180 airplanes listed in this Type Certificate Data Sheet.
Denny of Oakland