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

NEW Extreme EC7200A3F-E6 VSP 7254XSQ 24x 10G SFP+ 4x 40G QSFP+ F-B (AC) Switch

SKU: NSN-5843
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 Ruckus Brocade ICX7750-26Q ICX 7750 26x 40GB QSFP+ Switch

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

NEW Ruckus E40G-QSFP-4SFP-C-0301 3m 40GB QSFP+ to 4x 10GB SFP+ DA Breakout Cable

SKU: NSN-8478
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco C6800-SUP6T-XL Catalyst 6800 Switch Supervisor Engine 6T XL Module

SKU: NSN-2341
Condition: New
Shipping: Overnight Options
Warranty: 365 days