Your search for "hpe sfp28" revealed the following:
HPE R0P79A SN2700M 32x 100GB QSFP28 ONIE Front-to-Back Airflow Switch
SKU: NSB-8912
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 4,719.99
• 5 in stock
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HPE Q0U58B SN6600B 48x 32 Gigabit Fibre Channel SFP+ (24x Active) SAN Switch
SKU: NSB-8895
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 10,119.99
• Only 1 remaining
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HPE JH425A FlexFabric 12900E 18x 100GB QSFP28 18x 40GB QSFP+ Switch Line Card
SKU: NSB-8342
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 13,499.99
• Only 1 remaining
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NEW HPE Aruba J4858D 1GB BASE-SX LC OM2 MMF Optical SFP Transceiver
SKU: NSN-7129
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 127.99
• 13 in stock
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HPE R3B03A M-Series SN2700M 32x 100GB QSFP28 F-B Airflow (DC) Switch
SKU: NSB-8911
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 3,105.99
• Only 2 remaining
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HPE R1N28A 32x 100GB QSFP28 Back-to-Front Airflow Switch Module
SKU: NSB-5587
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 611.99
• Only 2 remaining
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NEW HPE R0P79A SN2700M 32x 100GB QSFP28 ONIE Front-to-Back Airflow Switch
SKU: NSN-2531
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 4,824.99
• 5 in stock
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NEW HPE Q8J73A 1310mm SMF MPO 500m QSFP28 Transceiver
SKU: NSN-0926
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 51.99
• Only 2 remaining
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NEW HPE P9H32A 32GB SW Fibre Channel SFP+ Transceiver
SKU: NSN-8561
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 974.99
• Only 2 remaining
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Cisco SFP-10/25G-BXD-I 25GB/50GB BASE-BR 1270nm 10km SMF SFP28 Transceiver
SKU: NSB-2488
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 764.99
• 4 in stock
Call if you need more