Heytrack were the original importers of Canam from 75 until 78 but they weren't importing much after late 76. TnT's, O/R's and some 77 Quals (not sure about any MX3's). Floods took over from there with the orange tankers and Qual 3 and 4.
During this period there was a branding issue where Repco had registered the Canam name resulting in the bikes being sold under the Bombardier logo.
The models ran -
1973/4 TnT & MX1
1975 TnT
1976 TnT, MX2,O/R
1977 TnT,Qualifier,MX3
1978 MX4, Qualifier
1979 MX5, Qualifier
1980 MX6, Qualifier
1981 MX6B, Qualifier
1982 Qualifier4
Hope this helps the curious. There are other models not included here but this covers the models we saw.