Your search for "QSFP-40G-PLR4" revealed the following:
NEW Arista QSFP-40G-PLR4 40GB BASE-LR4 1310nm SMF MTP-12 QSFP+ Transceiver
SKU: NSN-5333
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 178.99
• 65 in stock
Call if you need more
Arista QSFP-40G-PLR4 40GB BASE-LR4 1310nm SMF MTP-12 QSFP+ Transceiver
SKU: NSB-5339
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 62.99
• 8 in stock
Call if you need more