Your search for "Finisar FTLX8571" revealed the following:
Finisar FTLX8571D3BCL-HD 10GB BASE-SR MMF Transceiver
SKU: NSB-9081
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Finisar FTLX8573D3BTL-TM 10GB BASE-SR 850nm MMF SFP+ Transceiver
SKU: NSB-9914
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Finisar FTLX8574D3BCL-HD BASE-SR 10 Gigabit 850nm Short Range MMF Transceiver SF
SKU: NSB-8752
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days