Your search for "mma1b00-c100d" revealed the following:
Nvidia Mellanox MMA1B00-C100D 100GB BASE-SR4 850nm MPO QSFP28 Transceiver
SKU: NSB-3085
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 139.99
• 49 in stock
Call if you need more
NEW Mellanox MMA1B00-C100D 100GB BASE-SR4 850nm MPO QSFP28 Transceiver
SKU: NSN-8981
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 254.99
• 41 in stock
Call if you need more