Not sure if Canada has released the C2 sights, although I do know they have been used by other countries...the UK in particular. I have seen one or two listed on some overseas militaria sites so I know they are out there somewhere. Needless to say, I don't want anything "liberated" from the QM.
Please PM me with what you have and what you want for it and we'll see if we can't make a deal.
EDITED TO ADD: Found a C2 sight, so it fits the need perfectly. I would still be interested in a M4CDN sight if one came along.