Your search for "qfx fan" revealed the following:
Juniper JPSU-850W-DC-AFO QFX5100 Series 850W DC F-B Airflow Power Supply
SKU: NSB-0156
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5110-32Q-AFO 32x 40GB QSFP+ Front-to-Back Airflow Switch
SKU: NSN-2375
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MA-FAN-16K F-B Air Fan Module for MS350 MS410 Switches
SKU: NSN-8227
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5110-48S-AFO 48x 10GB SFP+ 4x 100GB QSFP28 Front-to-Back Air Switch
SKU: NSH-8241
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5110-48S-AFI 48x 10GB SFP+ 4x 100GB QSFP28 B-F Airflow Switch
SKU: NSN-3749
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco FAN-T3-F Catalyst 3850 B-F Airflow Switch Fan Module for the 3850-48XS
SKU: NSH-5696
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5210-64C-DC-AFI 64x 100GB QSFP28 B-F Airflow (DC) Switch
SKU: NSH-8262
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
nVidia Mellanox MTDF-FAN-A CS7500 Series Leaf Side Fan Unit
SKU: NSB-1012
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5110-48S-AFO 48x 10GB SFP+ 4x 100GB QSFP28 F-B Airflow Switch
SKU: NSN-3621
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-48S-AFO 48x 10GB SFP+ 6x 40GB QSFP+ Front-to-Back Air Switch
SKU: NSN-1678
Condition: New
Shipping: Overnight Options
Warranty: 365 days