Your search for "qsfp-100g-lr4" revealed the following:

Arista QSFP-100G-DR 100GB BASE-DR 500m SMF QSFP28 Transceiver

SKU: NSB-5286
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Finisar FTLC1151RDPL2 100GB BASE-LR4 1310nm QSFP28 Transceiver

SKU: NSB-1160
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Nvidia Mellanox MMA1L10-CR 100GB BASE-LR4 1310nm SMF LC QSFP28 Transceiver

SKU: NSB-3079
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days