Your search for "7000-rm-nt" revealed the following:
For Arista NEW 7000-RM-NT 7048 7050 7124S 7148SX 7150 Rack Mount Bracket Kit
SKU: NSH-1744
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 24.99
• 14 in stock
Call if you need more