https://www.ebay.com/sch/i.html?_nkw=Addon+Adtran+Compatible+Taa+Compliant+1000Base+Bx+Sfp+Transceiver+Smf+1550Nmtx+1490Nmrx+80Km+Lc+Dom+&_sacat=0&_dmd=2

Addon Adtran Compatible Taa Compliant 1000Base-Bx Sfp Transceiver (Smf; 1550Nmtx/1490Nmrx; 80Km; Lc; Dom)

$274.00
$191.00

Model Brand: AddOn