Your search for "qfx fan" revealed the following:
NEW Juniper EX4600-40F-DC-AFO 24x 10GB SFP+ 4x 40GB QSFP+ F-B Air (DC) Switch
SKU: NSN-3899
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco C9K-T1-FANTRAY Catalyst 9500 Series Switch Fan Tray
SKU: NSN-9739
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell S4048T-ON 210-AHMR 48x 10GB Copper 6x 40GB QSFP+ F-B Air OS9 Switch
SKU: NSB-2485
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell S4148U-ON 210-ALRZ 48x 24x Uni SFP+ 2x QSFP+ 4x QSFP28 F-B No OS10 Switch
SKU: NSB-9786
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco ASR-9922-FAN-V2 ASR 9000 Series Version 2 Router Fan Blade
SKU: NSN-3021
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper EX4400-FAN-AFI EX4400 Series Switch Fan Module
SKU: NSB-7767
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell S4048T-ON 210-AHMR 48x 10GB Copper 6x 40GB QSFP+ F-B Air OS10 Switch
SKU: NSB-0132
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista FAN-7001D-F 7280R Series Spare Front-to-Rear Air Switch Fan Module
SKU: NSN-6564
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Nvidia Mellanox MSN3420-CB2FC 48x 25GB SFP28 12x 100GB QSFP28 B-F CL Switch
SKU: NSN-0686
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Extreme 17112 Summit X670 Series Back-to-Front Airflow Switch Fan Module
SKU: NSN-5515
Condition: New
Shipping: Overnight Options
Warranty: 365 days