Your search for "PWR-500-DC-R" revealed the following:
NEW Arista DCS-7280SR-48C6-M-F 48x 10GB SFP+ 6x 100GB QSFP F-B Airflow Switch
SKU: NSN-2365
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Arista DCS-7050CX3-32S-D-R 32x 100GB QSFP100 2x 10GB SFP+ B-F Air Exp Mem Switch
SKU: NSB-9368
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280TR-48C6-F 48x 10GB Copper 6x 100GB QSFP28 F-B Airflow Switch
SKU: NSN-9773
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SRA-48C6-F 7280R 48x 10G SFP+ 6x 100G QSFP F-B Air Switch
SKU: NSN-4309
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050CX3-32S-R 32x 100GB QSFP100 2x 10GB SFP+ B-F Air Switch
SKU: NSN-3614
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SE-68-R 48x 10GB SFP+ 2x 100GB QSFP100 B-F Airflow Switch
SKU: NSN-3814
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7124SX-R 7100 Series 24x 10GB SFP+ Back-to-Front Airflow Switch
SKU: NSN-3139
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7124SX-F 7100 Series 24x 10GB SFP+ Front-to-Back Airflow Switch
SKU: NSN-3288
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SE-64-F 48x 10GB SFP+ 4x 40GB QSFP+ Front-to-Back Air Switch
SKU: NSN-2462
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SE-72-F 48x 10GB SFP+ 2x 100GB MXP Front-to-Back Air Switch
SKU: NSN-2427
Condition: New
Shipping: Overnight Options
Warranty: 365 days