Your search for "BR-MLXE-4-MR2" revealed the following:
Brocade BR-MLX-MR2-X MLX Series Router Management Module
SKU: NSH-7521
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 288.99
• Only 2 remaining
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Extreme Brocade BR-MLXE-4-MR2-M-AC 4x Slot MLXe-4 AC Router Chassis
SKU: NSB-6357
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Extreme Brocade BR-MLX-MR2-X MLX Router System Management Module
SKU: NSN-2479
Condition: New
Shipping: Overnight Options
Warranty: 365 days