Your search for "pwr-500-dc-r" revealed the following:
NEW Arista DCS-7050SX2-72Q-F 48x 10GB SFP+ 6x 40GB QSFP+ F-B Airflow Switch
SKU: NSN-2393
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050TX-96-F 48x 10GB Copper 12x 40GB (4x MXP) F-B Air Switch
SKU: NSN-4118
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280TRA-48C6-R 48x10G RJ45 6x100G QSFP AlgoMatch RF Switch Router
SKU: NSN-6781
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050SX-72Q-F 48x 10GB SFP+ 6x 40GB QSFP+ Front-to-Back Air Switch
SKU: NSN-2402
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050TX-48-R 32x 10GB Copper 4x 40GB QSFP+ B-F Airflow Switch
SKU: NSN-1927
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050TX-64-F 48x 10GB Copper 4x 40GB QSFP+ F-B Air Switch
SKU: NSN-2504
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050SX-72-F 48x 10GB SFP+ 2x MXP Front-to-Back Airflow Switch
SKU: NSN-2475
Condition: New
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-7280SR-48C6-M-R 48x 10GB SFP+ 6x 100GB QSFP28 B-F Airflow Switch
SKU: NSN-0397
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050TX-48-F 32x 10GB Copper 4x 40GB QSFP+ F-B Airflow Switch
SKU: NSN-3974
Condition: New
Shipping: Overnight Options
Warranty: 365 days