Your search for "qfx fan" revealed the following:
Juniper JPSU-650W-AC-AFI QFX5100 Series 650W AC B-F Air Switch Power Supply
SKU: NSB-0152
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Arista FAN-7100-R Back-to-Front Air Switch Fan Module for 7048 and 7100 Series
SKU: NSH-7156
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280QR-C36-M-F 24x 40G QSFP+ 12x 100G QSFP F-R Airflow Switch
SKU: NSN-1841
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco N2K-C2348TQ 48x 10GB Copper 6x 40GB QSFP+ B-F Airflow Fabric Extender
SKU: NSH-5822
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX-SFP-DAC-1MA 1m 10GB SFP+ Direct Attach Copper Cable
SKU: NSN-7642
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco N5624-B-24Q 24x 40GB QSFP+ Front-to-Back Airflow Switch
SKU: NSB-7102
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX-SFP-10GE-LR 10GB BASE-LR 1310nm SMF SFP+ Transceiver
SKU: NSN-6791
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7160-32CQ-F 32x 100GB QSFP100 Front-to-Back Airflow Switch
SKU: NSN-2384
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco DS-C48S-FAN MDS 9100 Series 9148S Switch Fan Tray
SKU: NSN-5513
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7250QX-64-F 64x 40GB QSFP+ Front-to-Back Airflow Switch
SKU: NSN-2459
Condition: New
Shipping: Overnight Options
Warranty: 365 days