https://www.ebay.com/sch/i.html?_nkw=Addon+Cisco+Compatible+Taa+Compliant+1000Base+Bx+Sfp+Transceiver+Smf+1490Nmtx+1310Nmrx+20Km+Lc+Rugged+&_sacat=0&_dmd=2

Addon Cisco Compatible Taa Compliant 1000Base-Bx Sfp Transceiver (Smf; 1490Nmtx/1310Nmrx; 20Km; Lc; Rugged)

$290.00
$204.00

Model Brand: AddOn Details Device Type: SFP (mini-GBIC) Protocols: Gigabit Ethernet Ports: 1 x LC 1000Base-BX Network 1 x 1000Base-BX Power Adapter: Hot-swappable