I recently did via Punjab Insurance.
https://www.healthquotes.ca/VisitorsToCanada/insurance-quotes.aspx
https://www.sunlife.ca/ca/Insurance/Travel+insurance/Health+insurance+for+the+Parent+and+Grandparent+Super+Visa?vgnLocale=en_CA
https://www.punjabinsurance.ca/benefits-comparison-of-the-super-visa-health-insurance-plan
General Website for comparison
https://parentsupervisa.ca/canadian-supervisa-comparison-quote.php
Good Luck
Syed B