There are 2 CPA16-4's in Canada, CP 4104, a late model unit is in Calgary, and is operable. CP 4065, an early model, and former demonstrator is in the Canada Science & Technology museum in Ottawa, and sits basically in the same state as when retired. I don't believe either are currently accessable to the public.
There are 2 CFB16-4's in Alberta, both were converted to remote control cars by the BCR in the early '70's CP 4455, 4456, both early units. Thankfully, unlike the C-liner B-units that CP converted to remote(robot) cars around the same time, the BCR ones still look basically as they should, the CP ones(which were all scrapped in the late '80's) were much more modified.
I believe these are the only ones left anywhere. The A-units were retired in 1975, the B's in '71 or earlier