Your search for "DCS-7308X-FM-F" revealed the following:
Arista DCS-7308X-FM-F (Integrated Fan) Front-to-Back Airflow Fabric-X Module
SKU: NSH-9655
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Arista DCS-7308X-FM-R (Integrated Fan) Back-to-Front Airflow Fabric-X Module
SKU: NSH-9656
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Arista DCS-7308-CH 7300X Series 7308 Switch Chassis Only
SKU: NSB-2646
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days