Your search for "qfx fan" revealed the following:
NEW Cisco ASR-9001-FAN-V2 ASR 9000 Series Router Fan Assembly
SKU: NSN-9702
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-48S-DC-AFI 48x 10GB SFP+ 6x 40GB QSFP+ B-F Air (DC) Switch
SKU: NSN-3947
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper FFANTRAY-MX480 MX480 6x Fan HC Fan Tray
SKU: NSH-7433
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5120-48Y-DC-AFO 48x 25GB SFP+ 8x 100GB QSFP28 F-B Air (DC) Switch
SKU: NSN-3629
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco N56128-FAN-B Front-to-Back Airflow (Port Side Intake) Switch Fan Module
SKU: NSB-7095
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5100-24Q-AA-AFI 24x 40GB QSFP+ 1x DW Slot Back-to-Front Air Switch
SKU: NSH-8216
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Cisco NCS-1RU-FAN-FW NCS Series Front-to-Back Airflow Router Fan
SKU: NSB-8167
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5120-48Y-DC-AFI 48x 25GB SFP+ 8x 100GB QSFP28 B-F Air (DC) Switch
SKU: NSN-3628
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper EX4300-48MP-FAN EX4300 Series Front-to-Back Airflow Fan Module
SKU: NSN-4739
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco ASR-920-FAN-M ASR920 Series Fan for Router Modular Chassis
SKU: NSH-4613
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days