Courtney,
Here's what I found:
Cessna 402 B & C: 6-10 seats
Fairchild SA227-AC (Metro III): 19 seats, SA227 AT(Merlin IV): 13-18 seats
Lear 35A: 10 seats
Piper PA-31 (Chieftain): 6-10 seats
Piper PA-32-300 (Cherokee Six): 6 seats
Beech/Raytheon 1900: 19 passengers
Beech B99, C99: ?
Data from
www.aso.com and THE AVIATOR'S SOURCE BOOK, Barbara Buchholz, St. Martin's Press, NY: 1982
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DJSchaut