Your search for "qfx fan" revealed the following:
NEW Juniper QFX3008-SF16Q QFX Series 16x 40GB QSFP+ Switch Module
SKU: NSN-8676
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX3008-SR1 QFX3008-I QFabric Series Switch Rear Fabric Card
SKU: NSN-8900
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5200-48Y-AFO 48x 25GB SFP28 6x 100GB QSFP28 F-B Air Switch
SKU: NSN-3538
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco C4KX-FAN-R Catalyst 4500-X Series Front-to-Back Airflow Switch Fan
SKU: NSN-9095
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5120-32C-AFI 32x 100GB QSFP28 Back-to-Front Airflow Switch
SKU: NSH-9464
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper JPSU-650W-AC-AI QFX5120 Series 650W AC B-F Airflow Power Supply
SKU: NSB-0458
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-48S-DC-AFO 48x 10GB SFP+ 6x 40GB QSFP+ F-B Air (DC) Switch
SKU: NSN-1570
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX3100-PWRAC-560A
SKU: NSB-0125
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5100-48T-DC-AFI 48x MultiGB RJ-45 6x 40GB QSFP+ B-F Air (DC) Switch
SKU: NSH-8212
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper JPSU-650W-AC-AI QFX5120 Series 650W AC B-F Airflow Power Supply
SKU: NSN-0399
Condition: New
Shipping: Overnight Options
Warranty: 365 days