Your search for "ec8404008-e6" revealed the following:
Extreme EC8404008-E6 VSP 8400 Series 8424GT 24x 1GB RJ45 Switch Module
SKU: NSH-9484
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 159.99
• Only 1 remaining
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NEW Extreme EC8404008-E6 VSP 8400 Series 8424GT 24x 1GB RJ45 Switch Module
SKU: NSN-5001
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 171.99
• Only 2 remaining
Call if you need more