Amazon.com : 49mm Lens Cap Cover Compatible for Canon EOS M50 EF-M 15-45mm f/3.5-6.3 is STM Lens,for EOS M200 M50 M5 M6 Mark II M100 Camera HUIPUXIANG [2 Pack] : Electronics
49mm Snap-On Front Lens Cap/Cover Compatible with Canon EF 15-45mm Lens Kit EOS M5 M6 M50 M100 M200 - AliExpress
Other Lensafe Universal 49mm Lens Cap - Accessory – Kamerastore