Your search for "SXP3101NV-N2" revealed the following:
Nortel SXP3101NV-N2 10GB BASE-LR LW 1310nm XFP Transceiver
SKU: NSB-8415
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 49.99
• 10 in stock
Call if you need more
Nortel NTTP81BA-03 10GB Base-LR/LW 1310nm SXP3101NV-N2 XFP Transceiver
SKU: NSB-8820
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 69.99
• 9 in stock
Call if you need more