Your search for "nxa-fan" revealed the following:
Cisco N5K-C5696-FAN-B Front-to-Back Airflow (Port Side Intake) Fan Module
SKU: NSB-3226
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco NXA-PAC-1100W-PI2 1100W AC Front-to-Back Airflow Switch Power Supply
SKU: NSN-4648
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5200-32C-FANAFI QFX5200 Series B-F Airflow Switch Fan Module
SKU: NSB-5054
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N5K-C5010-FAN Nexus 5000 Series 5010 Switch Fan Module
SKU: NSN-5386
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW HPE Aruba JL631A CX 8325 Series Back-to-Front Airflow Switch Fan
SKU: NSN-6501
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N2K-C2232-FAN Nexus 2000 Back-to-Front Airflow Switch Fan Module
SKU: NSN-0390
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper FFANTRAY-MX240-HC-S MX240 Series High Capacity Switch Fan Tray
SKU: NSH-9640
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5100-96S-FANAFI QFX5100 Series B-F Airflow Switch Fan Module
SKU: NSH-9456
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
NEW Juniper QFX5110-FANAFO F-B Switch Fan Module for QFX5110, QFX5120, EX4650
SKU: NSN-4716
Condition: New
Shipping: Overnight Options
Warranty: 365 days