Your search for "qfx fan" revealed the following:
Nvidia Mellanox MSN3420-CB2FC 48x 25GB SFP28 12x 100GB QSFP28 B-F P2C CL Switch
SKU: NSB-1033
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Nvidia Mellanox MSN2410-BB2F 48x 10GB SFP28 8x QSFP28 B-F Air Onyx Switch
SKU: NSN-9264
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Arista DCS-7324X-FM-F Front-to-Back Airflow (Integrated Fans) Fabric Module
SKU: NSB-5400
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Cisco N5K-C5648Q 24x 40GB QSFP+ 2x GEM Slot Front-to-Back Air Switch Chassis
SKU: NSH-7707
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5200-48Y-DC-AFI 48x 25GB SFP28 6x 100GB QSFP28 B-F Air DC Switch
SKU: NSN-3633
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7324X-FM-F 7320X Series F-B Air (Integrated Fans) Fabric Module
SKU: NSN-0206
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco N9K-C9316D-GX Nexus 9300-GX 16x 400GB QSFP-DD B-F Airflow Switch
SKU: NSB-2125
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050QX2-32S-F 32x 40GB QSFP+ 4x 10GB SFP+ F-B Airflow Switch
SKU: NSN-2435
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell S4148FE-ON 48x 10GB SFP+ 2x 40GB QSFP+ 4x 100GB QSFP28 F-B Air OS10 Switch
SKU: NSH-9213
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX-SFP-DAC-10MA 10m 10GB SFP+ Direct Attach Copper Cable
SKU: NSN-7065
Condition: New
Shipping: Overnight Options
Warranty: 365 days