Around 45% of the firms surveyed said they expected inflation to be higher than 3% over the next two years, with half seeing the drivers of that inflation as temporary. By David Ljunggren OTTAWA, Oct 18 (Reuters) - Canadian companies anticipate stronger demand as the COVID-19 pandemic fades, but many say supply constraints will limit sales and put upward pressure on costs, a regular Bank of Canada survey said on Monday. Most firms continue to anticipate healthy growth in both domestic and foreign demand ... particularly (from) the United States," said the survey.