Your search for "R0X42A" revealed the following:
HPE Aruba R0X42A CX 6400 Series 24x 10GB Copper 4x 25GB SFP56 Switch Line Card
SKU: NSB-6467
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 3,047.99
• Only 2 remaining
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NEW HPE Aruba R0X26A CX 6405 Switch Chassis Bundle
SKU: NSN-8062
Condition: New
Shipping: Overnight Options
Warranty: 365 days