I don't know about the Canadian part. But as to AIM, I have to give them one thing: the questions that I've had for them, they (that is, Dr. ********) has responded to them rather quickly.
According to Dr. ********, they've have only about 40 students from North America go to Poland. Out of those, only three have taken (and they all passed) Step 1 of USMLE. There are no students who have graduated yet.
AIM/MUL are connected to hospitals in Conneticut, Ohio, Pennsylvania, Louisiana--she gave me a short list.
I've found her to be very helpful, so far.
I'll let you know more when I find out.