Your search for "nxa-fan" revealed the following:
Juniper QFX5110-FANAFI B-F Air Switch Fan for QFX5110, QFX5120 and EX4650
SKU: NSB-0370
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 C4KX-FAN-F Catalyst 4500-X Series Back-to-Front Cooling Switch Fan
SKU: NSN-6200
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco NCS-1RU-FAN-FW NCS Series Front-to-Back Airflow Router Fan
SKU: NSB-8167
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Ruckus Brocade ICX-FAN10-E ICX 7450 Series Front-to-Back Airflow Switch Fan
SKU: NSN-0004
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco NXA-PDC-930W-PE 930W DC B-F (Port Side Exhaust) Power Supply for N9K
SKU: NSN-3513
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 Cisco Meraki MA-FAN-18K F-B Fan Module for MX105, MX250, MX450 Firewalls
SKU: NSN-5504
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Extreme 17115 SLX 9030 Series Front to Back Airflow Switch Fan
SKU: NSN-5848
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5110-FANAFI B-F Air Switch Fan for QFX5110, QFX5120 and EX4650
SKU: NSN-0324
Condition: New
Shipping: Overnight Options
Warranty: 365 days