Hello stuartswan,
As you have seen already, the Canon driver download provided by Apple does not include drivers for the larger imageRUNNER business products. The download only has the consumer inkjet and some laser products.
FYI - the CLC3200 is known as an iRC3200 in other regions. Canon Europa added the CLC tag to indicate the machine had the imagePASS-C1 print controller attached.
At this point in time, EFI, the makers of the imagePASS-C1, have not released a driver update for 10.6. But they have released an updater tool on their web site that will change the permissions on some files within the driver folder to allow you to complete the installation (you are probably getting the message 'the printer software was installed incorrectly'). For this updater tool to work correctly, you do need to have installed the Universal Binary version of the imagePASS-C1 driver. You can download the UB driver via this link...
http://www.canon.com.au/products/copiers/controllers/imagepassc1_drivers.aspx
The EFI update can be downloaded via this link...
http://services.efi.com/support/drivers/download2.asp?oem=efi&sys=Applemac_osx106&ver=NA
Regarding the iRC2380, you should be able to use the UFR2 v2.00 driver. While it is not listed as being officially supported on 10.6, it does work okay. You can download the UFR2 v2.00 driver via this link...
http://www.service.canon.com.au/drivers/files/ir/osxufr2v200.zip
Hope this helps.
Pahu