I think if you ring up Canon Parts Sales, you can request them to send you a PDF of the parts list (similar to the ones listed). The ones in the original post would have been made available about 2000 or 2001 judging from the selection of lenses available.
I just called Canon Parts to find out about replacement PCBs for my 580EX and because there are something like 10 PCBs in there, they just emailed me the parts list (NOT the service manual) so I could identify the correct PCB for them.
After that, you just tell them the part number, they quote you a price (usually surprisingly cheap compared to the cost of a new lens/camera/flash) and you simply give them a credit card number and address. Easy. The hard part is installing the part yourself

Most definitely. I was surprised the price on a new focus screen (I think $3?) was so cheap.



