Your search for "QFX FAN" revealed the following:
NEW Cisco N2K-C2232-FAN-B Nexus 2000 Front-to-Back Airflow Switch Fan Module
SKU: NSN-0396
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper JNP-FAN-1RU MX Series Router Fan Tray for MX204
SKU: NSH-7292
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco ASR-9006-FAN-V2 ASR 9000 Series Router 2x Fan Tray
SKU: NSN-3448
Condition: New
Shipping: Overnight Options
Warranty: 365 days
HPE Aruba JL630A CX 8325 Series Front-to-Back Airflow Switch Fan
SKU: NSB-5533
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista FAN-7000H-F F-B Fan Module for 7050X3, 7060X, 7160, 7280R Series
SKU: NSN-5163
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
Cisco N5K-C5696-FAN Back-to-Front Airflow (Port Side Exhaust) Fan Module
SKU: NSB-7096
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-24Q-3AFI 24x 40GB QSFP+ 2x Mod Slot Back-to-Front Air Switch
SKU: NSN-2302
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper SRX5600-FAN SRX Series Fan Tray for SRX5600
SKU: NSN-3962
Condition: New
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