Your search for "Finisar FTLF8524" revealed the following:

Finisar FCLF-8521-3-ER 1GB BASE-T RJ45 Copper SFP Transceiver

SKU: NSB-7092
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Finisar FCLF-8520-3 1GB BASE-T RJ45 Optical SFP Transceiver

SKU: NSN-9305
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Finisar FCMJ-8520-3 1GB BASE-T RJ45 Optical SFP Transceiver

SKU: NSB-1437
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days