Your search for "PWR-500AC-R" revealed the following:
NEW Arista DCS-7280SR-48C6-R 48x 10GB SFP+ 6x 100GB QSFP B-F Airflow Switch
SKU: NSN-1838
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Arista DCS-7020SR-24C2-F 24x 10GB SFP+ 2x 100GB QSFP F-B Air Switch
SKU: NSH-8203
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SE-72-R 48x 10GB SFP+ 2x 100GB MXP Back-to-Front Air Switch
SKU: NSN-2449
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050TX-72-F 48x 10GB Copper 6x 40GB (2xMXP) F-B Airflow Switch
SKU: NSN-6525
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7020TRA-48-F 7020R Series 48x GE RJ45 6x 10G SFP+ F-B Air Switch
SKU: NSN-4116
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SE-64-R 48x 10GB SFP+ 4x 40GB QSFP+ Back-to-Front Air Switch
SKU: NSN-0084
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280TR-48C6-R 48x 10GB Copper 6x 100GB QSFP28 B-F Airflow Switch
SKU: NSN-3567
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7020SR-24C2-F 24x 10GB SFP+ 2x 100GB QSFP F-B Airflow Switch
SKU: NSN-4911
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7020TR-48-F 48x GE RJ45 6x 10G SFP+ F-B Airflow Switch
SKU: NSN-2447
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7160-48YC6-F 48x 25GB SFP+ 6x 100GB QSFP Front-to-Back Air Switch
SKU: NSN-2382
Condition: New
Shipping: Overnight Options
Warranty: 365 days