Your search for "ma-cbl-40g-50cm" revealed the following:
Cisco Meraki MA-CBL-100G-50CM 0.5m 100GB QSFP28 Stacking Cable for MS450 MS355
SKU: NSB-6448
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MA-CBL-100G-3M 3m 100GB QSFP28 Stacking Cable for MS450 MS355
SKU: NSN-5525
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco Meraki MA-CBL-100G-3M 3m 100GB QSFP28 Stacking Cable for MS450 MS355
SKU: NSB-6434
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MS225-48-HW 48x 1GB RJ45 4x 10GB SFP+ Unclaimed Switch
SKU: NSN-4797
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MS210-24P-HW 24x 1GB PoE+ RJ45 4x 1GB SFP Unclaimed Switch
SKU: NSN-4314
Condition: New
Shipping: Overnight Options
Warranty: 365 days