Your search for "PWR-500-DC-R" revealed the following:
NEW Arista DCS-7020TRA-48-R 7020R Series 48x GE RJ45 6x 10G SFP+ B-F Air Switch
SKU: NSN-4117
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7160-48YC6-R 48x 25GB SFP+ 6x 100GB QSFP Back-to-Front Air Switch
SKU: NSN-1845
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7020SR-24C2-R 24x 10GB SFP+ 2x 100GB QSFP B-F Air Switch
SKU: NSN-4912
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7160-48TC6-R 48x 10GB Copper 6x 100GB QSFP B-F Airflow Switch
SKU: NSN-2456
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050TX-72Q-F 48x 10GB Copper 6x 40GB QSFP+ F-B Airflow Switch
SKU: NSN-3995
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7160-32CQ-R 32x 100GB QSFP100 Back-to-Front Airflow Switch
SKU: NSN-3758
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050TX-72Q-R 48x 10GB Copper 6x 40GB QSFP+ B-F Airflow Switch
SKU: NSN-4224
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7060SX2-48YC6-R 48x 25GB SFP28 6x 100GB QSFP B-F Airflow Switch
SKU: NSN-5791
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050SX-96-F 48x 10GB SFP+ 4x MXP Front-to-Back Airflow Switch
SKU: NSN-2519
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050SX-72Q-R 48x 10GB SFP+ 6x 40GB QSFP+ Back-to-Front Air Switch
SKU: NSN-4910
Condition: New
Shipping: Overnight Options
Warranty: 365 days