Fintie Band Compatible with Garmin Fenix 5X/5X Plus, Fenix 6X/6X Pro, Fenix 7X, Fenix 3/3 HR, 26mm Quickfit Soft Nylon Sport Strap Compatible with Garmin Descent MK1/D2 Delta PX/D2 Charlie - Walmart.com
Amazon.com: Garmin fenix 5X Plus, Ultimate Multisport GPS Smartwatch, Features Color Topo Maps and Pulse Ox, Heart Rate Monitoring, Music and Contactless Payment, Gray with Titanium Band : Electronics
For those wondering, here's a side-by-side of the 5x Plus and the 6x Pro : r/GarminFenix
ISABAKE Watch Band for Garmin Fenix 6X/6X Pro, Quick Fit 26mm Wristbands,Compatible with Fenix 6X/6X Pro Fenix 5X/5X Plus Fenix 3/3 HR (Army Green) - Yahoo Shopping
Garmin Fenix 5X Plus Sapphire, Black with Black Band - Walmart.com