Your search for "dcs-7808r3-fm2" revealed the following:
Arista DCS-7808R3-FM 7800R3 Series Switch Fabric Module for 7808 Chassis
SKU: NSB-0990
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 1,057.99
• 19 in stock
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Arista DCS-7808R3-FM2 7800R3 Series Switch Fabric Module for 7808 Chassis
SKU: NSB-0991
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days