Your search for "PWR-500-DC-R" revealed the following:
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-7280SRA-48C6-R 48x 10G SFP+ 6x 100G QSFP B-F Air Switch
SKU: NSN-4308
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7060CX2-32S-R HPE JH977A 32x 100GB QSFP 2x 10GB SFP+ B-F Switch
SKU: NSN-3590
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Arista DCS-7280SR3K-48YC8-F 48x 25GB SFP28 8x 100GB QSFP28 F-B Air Switch Router
SKU: NSB-9427
Condition: Seller refurbished
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-7050QX2-32S-R 32x 40GB QSFP+ 4x 10GB SFP+ B-F Airflow Switch
SKU: NSN-2436
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7060CX-32S-F HPE JH576A 32x 100GB QSFP 2x 10GB SFP+ F-B Switch
SKU: NSN-2424
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050QX2-32S-F 32x 40GB QSFP+ 4x 10GB SFP+ F-B Airflow Switch
SKU: NSN-2435
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050SX2-72Q-R 48x 10GB SFP+ 6x 40GB QSFP+ B-F Airflow Switch
SKU: NSN-2394
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