Your search for "slx fan" revealed the following:
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 ASR-9922-FAN ASR 9900 Series 12 Fan Router Fan Tray
SKU: NSN-3269
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco DS-C96S-FAN-I MDS 9300 Series Port Side Intake Switch Fan
SKU: NSB-6897
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
Juniper QFX5200-32C-FANAFO QFX5200 Series F-B Airflow Switch Fan Module
SKU: NSB-5053
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MA-FAN-18K F-B Fan Module for MS350 MS355 MS425 and MS450
SKU: NSN-6118
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco N2K-C2232-FAN-B Nexus 2000 Front-to-Back Airflow Switch Fan Module
SKU: NSB-7153
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-96S-FANAFI QFX5100 Series B-F Airflow Switch Fan Module
SKU: NSN-4699
Condition: New
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 Juniper QFX5100-FAN-AFO EX4600 Series Front-to-Back Air Switch Fan Module
SKU: NSN-1361
Condition: New
Shipping: Overnight Options
Warranty: 365 days