I read that 50 were purchased in 2020. I’m sure they have more - at least the older versions, if not more of the latest. But I think it was 50 live missiles.
The Government of Canada has requested to buy fifty (50) Sidewinder AIM-9X Block II Tactical missiles; fifty (50) Sidewinder AIM-9X Block II Captive Air Training Missiles (CATMs); ten (10) Sidewinder AIM- 9X Block II Special Air Training Missiles (NATMs); ten (10) Sidewinder AIM-9X Block II Tactical Guidance Units; ten (10) Sidewinder AIM-9X Block II CATM Guidance Units; thirty-eight (38) APG-79(V)4 Active Electronically Scanned Array (AESA) radar units; thirty-eight (38) APG-79(V)4 AESA Radar A1 kits; twenty (20) Joint Standoff Weapon (JSOW) C, AGM-154C; forty-six (46) F/A-18A Wide Band RADOMEs. Also included are additional technical and logistics support for the AESA radar; upgrades to the Advanced Distributed Combat Training System (ADCTS) to ensure flight trainers remain current with the new technologies; software development to integrate the systems listed into the F/A-18A airframe and install Automated Ground Collision Avoidance System (Auto GCAS); thirty (30) Bomb Release Unit (BRU) - 42 Triple Ejector Racks (TER); thirty (30) Improved Tactical Air Launched Decoy (ITALD); one hundred four (104) Data Transfer Device/Data Transfer Units (DTD/DTU); twelve (12) Joint Mission Planning System (JMPS); one hundred twelve (112) AN/ARC-210 RT-2036 (Gen 6) radios and F/A-18 integration equipment; support equipment; tools and test equipment; technical data and publications; U.S. Government and contractor engineering, technical, and logistics support services; and other related elements of logistical and program support. The total estimated program cost is $862.3 million.