Your search for "juniper qsfp-40g" revealed the following:
NEW Cisco N2K-C2348TQ 48x 10GB Copper 6x 40GB QSFP+ B-F Airflow Fabric Extender
SKU: NSN-2074
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco C9500-32QC-E Catalyst 9500 32x 40GB QSFP+ Switch
SKU: NSN-4262
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista HPE DCS-7260QX-64-R JH802A 64x 40GB QSFP+ 2x 10GB SFP+ B-F Air Switch
SKU: NSN-3586
Condition: New
Shipping: Overnight Options
Warranty: 365 days
HPE R0Y49A 6x 40G QSFP 48x 10G SFP+ Back to Front Airflow Switch Fabric Module
SKU: NSB-5625
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista HPE DCS-7260QX-64-F JH801A 64x 40GB QSFP+ 2x 10GB SFP+ F-B Air Switch
SKU: NSN-2411
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW HPE JH236A 5m 40GB QSFP+ Direct Attach Copper Cable
SKU: NSN-5511
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
NEW Arista DCS-7280QR-C36-R 24x 40GB QSFP+ 12x 100GB QSFP28 B-F Airflow Switch
SKU: NSN-2362
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-7280QRA-C36SM-F 24x 40G QSFP+ 12x QSFP28 F-B Air Switch Router
SKU: NSN-6776
Condition: New
Shipping: Overnight Options
Warranty: 365 days