Your search for "qfx fan" revealed the following:

Cisco N3K-C3048-FAN Nexus 3000 Back-to-Front Airflow (Port Side Exhaust) Fan

SKU: NSH-5308
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco N56128-FAN-F Back-to-Front Airflow (Fan Side Intake) Switch Fan

SKU: NSN-2453
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco C3KX-FAN-23CFM Catalyst 3750X Series Switch Fan

SKU: NSN-1523
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper JPSU-650W-DC-AFI QFX 650W DC Back-to-Front Airflow Power Supply

SKU: NSB-3337
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QFX-PFA-4Q 4x 40GB QSFP+ Packet Flow Accelerator Switch Module

SKU: NSN-4856
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper QFX5110-32Q-AFO 32x 40GB QSFP+ Front-to-Back Airflow Switch

SKU: NSH-8245
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper JPSU-650W-DC-AFI QFX 650W DC Back-to-Front Airflow Power Supply

SKU: NSN-9016
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Extreme XN-FAN-001-R SLX 9150 Series Back-to-Front Airflow Switch Fan

SKU: NSB-0094
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Extreme Brocade BR-MLXE-4-FAN MLXe Series Exhaust Fan Assembly Kit

SKU: NSH-9223
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Nvidia Mellanox MTEF-FANF-A B-F Airflow (P2C) Switch Fan Module

SKU: NSB-6785
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days