Before I got to page two of this thread I was thinking about a GarandI had 15 years ago that had the same timing issue as you have. In my case the accelerator had been installed backwards in the op rod catch. In your case you are missing the accelerator completely. You should find one on-line but it may be easier to buy a complete op rod catch. You may also run into businesses that do not want to ship to Canada
. Maybe a member here can help you out or start emailing sellers on websites or fleabay and ask if they would ship to Canada.