Rotornut;
Niagara Helicopters was in business for several years before the 1970s and was begun by Paul Ostrander. I applied there for flight training when I was still in the Canadian Army in the early '60s. You will see from the attached link that they operated 7 Bell 47Gs in 1971 at Niagara Falls.
http://viking.twolaneroads.com/pix/VikingFleet_1971.pdf
His son Bill was also a helicopter pilot who flew the S76 and AS332 at Sealand Helicopters in the '80s.
Paul was definitely one of the helicopter pioneers in Canada along with Brady, Agar, Soutar and others.
carholme