Your search for "qfx fan" revealed the following:
NEW Cisco NCS-1RU-FAN-FW NCS Series Front-to-Back Airflow Router Fan
SKU: NSN-9478
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper SRX3400-FAN-A SRX3400 Series 4x Fans / FanTray
SKU: NSH-6978
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5210-64C-AFO QFX5210 Series 64x 100GB QSFP28 F-B Airflow Switch
SKU: NSH-8261
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5120-32C-AFI QFX5120 Series 32x 100GB QSFP28 B-F Airflow Switch
SKU: NSN-3712
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5210-64C-AFO 64x 100GB QSFP28 F-B Airflow Switch
SKU: NSN-3636
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
NEW Juniper JPSU-650W-AC-AFI QFX5100 Series 650W AC B-F Air Switch Power Supply
SKU: NSN-0259
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper SRX5800-FAN SRX5800 Series Services Gateway 6x Fan Tray
SKU: NSB-0350
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N6K-C6001-FAN-B Front-to-Back Airflow (Port Side Intake) Fan Module
SKU: NSN-9733
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW HPE Aruba JL631A CX 8325 Series Back-to-Front Airflow Switch Fan
SKU: NSN-6501
Condition: New
Shipping: Overnight Options
Warranty: 365 days