https://www.ebay.com/sch/i.html?_nkw=Addon+Cisco+Sfp+Oc3+Ir1+Compatible+Sfp+Transceiver+Sfp+Mini+Gbic+Transceiver+Module&_sacat=0&_dmd=2

Addon Cisco Sfp-Oc3-Ir1 Compatible Sfp Transceiver - Sfp (Mini-Gbic) Transceiver Module

Regular price
$228.00
Sale price
$156.00

SFP (mini-GBIC) transceiver module - OC-3/STM-1