Your search for "Juniper QSFP-40G" revealed the following:

NEW Arista DCS-7160-48TC6-F 48x 10GB Copper 6x 100GB QSFP F-B Air Switch

SKU: NSN-2432
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Ruckus Brocade ICX7750-26Q ICX 7750 26x 40GB QSFP+ Switch

SKU: NSN-2433
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco Meraki MS355-24X2-HW 24x mGig UPoE 4x SFP+ 2x QSFP+ Unclaimed Switch

SKU: NSN-3600
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco N3K-C3172TQ-32T 32x 10GB Copper 6x 40GB QSFP+ Front-to-Back Air Switch

SKU: NSN-8245
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Extreme EC7200A1F-E6 VSP 7254XSQ 48x 10G SFP+ 6x 40G QSFP+ F-B (AC) Switch

SKU: NSN-3570
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7280TR-48C6-F 48x 10GB Copper 6x 100GB QSFP28 F-B Airflow Switch

SKU: NSN-9773
Condition: New
Shipping: Overnight Options
Warranty: 365 days