There are three major variations of the Beech 1900D: one with a small mountain on the tail, one with a large mountain, and one with no mountain (blank). Those with photos on Airliners.net are broken down as follows:
Reg: CN: Fin#: Tail:
C-FCMP UE-271 912 Large Mountain
C-FCMV UE-272 913 Small Mountain
C-FCMN UE-276 914 Large Mountain
C-FCME UE-277 915 Small Mountain
C-FCMB UE-278 916 Small Mountain
C-FCMO UE-281 917 Small Mountain
C-FCMR UE-283 918 Small Mountain
C-FCMU UE-285 919 Small Mountain
C-GCMA UE-289 920 Small Mountain
C-GGBY UE-351 923 Blank
C-GGCA UE-359 924 Blank
C-GCML UE-243 925 Large Mountain
(Wikipedia lists three additional aircraft: UE-76, UE-287, and UE-346. However, all these aircraft seem to be flying for sister company Northern Thunderbird Air.)
There are two Dornier 328-100s:
Reg: CN: Scheme:
C-FDYN 3096 White and Blue
C-FHVX 3094 White and Red
If you're using Steve Lewis' fall 2010 flight plans (AvSim: central_mountain_air_f10.zip, FlightSim: centralmountainair.zip), these match up as follows: