https://www.ebay.com/sch/i.html?_nkw=Addon+Juniper+Sfp+1Oc48+Sr+Compatible+Sfp+Transceiver+Sfp+Mini+Gbic+Transceiver+Module&_sacat=0&_dmd=2

Addon Juniper Sfp-1Oc48-Sr Compatible Sfp Transceiver - Sfp (Mini-Gbic) Transceiver Module

$206.00
$141.00

SFP (mini-GBIC) transceiver module (equivalent to: Juniper SFP-1OC48-SR) - LC single-mode - up to 1.2 miles - OC-48/STM-16 SR-1 - 1310 nm - for Juniper M-series M7i