Your search for "qfx fan" revealed the following:
Arista FAN-7100-F Front-to-Back Air Fan Module for for 7048 and 7100 Series
SKU: NSH-6406
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 69.99
• Only 2 remaining
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Cisco N9K-C93128TX 96x 10GB Copper 8x 40GB QSFP+ Back-to-Front Airflow Switch
SKU: NSH-5232
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 342.99
• Only 2 remaining
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Arista FAN-7000-R B-F Fan Module for 7020R, 7060CX, 7280E, 7280R Series
SKU: NSH-2746
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 22.99
• 6 in stock
Call if you need more
NEW HPE JG553A 5900 Series Back-to-Front Airflow Switch Fan Tray
SKU: NSN-7422
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 56.99
• Only 2 remaining
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NEW Juniper QFX10000-30C QFX 10000 30x 100GB QSFP28 Switch Line Card
SKU: NSN-3769
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 1,762.99
• Only 2 remaining
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Cisco ACS-4450-FANASSY Fan Assembly for ISR 4450 and 4350 Routers
SKU: NSB-2138
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 79.99
• Only 2 remaining
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Juniper QFX-SFP-10GE-LR 10GB BASE-LR 1310nm SMF SFP+ Transceiver
SKU: NSB-0304
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 39.99
• Only 2 remaining
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NEW Arista FAN-7000-R B-F Fan Module for for 7048, 7050, 7124SX, 7150 Series
SKU: NSN-5950
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 51.99
• Only 3 remaining
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Cisco Meraki MA-FAN-16K2 F-B Fan Module for MS390 Series Switches
SKU: NSB-1518
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 59.99
• 11 in stock
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Cisco UCS-FAN-6296UP UCS 6200 Series Router Fan Module
SKU: NSH-6121
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 48.99
• 7 in stock
Call if you need more