Your search for "hpe xfp to sfp" revealed the following:
NEW Extreme 10063 100Mbps BASE-FX MMF SFP Transceiver
SKU: NSN-5738
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Intel E10GSFPSR FTLX8571D3BCV-I3 10GB BASE-SR 850nm 300m MMF SFP+ Transceiver
SKU: NSB-8424
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco SFP-10G-ER 10GB BASE-ER Extended Reach SMF Optical SFP+ Transceiver
SKU: NSN-1733
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper EX-SFP-10GE-ER 10GB BASE-ER 1550nm SMF SFP+ Transceiver
SKU: NSN-5117
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Finisar FTLX1611M3 10GB BASE-EW OC-192 IR-2 SFP+ 1550nm SMF Transceiver
SKU: NSN-8703
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW HPE Aruba JL579A 8320 Series 32x 40GB QSFP+ Switch
SKU: NSN-3643
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper EX4400-EM-4S EX4400 Series 4x 10GB SFP+ Switch Module
SKU: NSB-7759
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
D-Link DXS-3227-TAA 24x 1GB RJ45 4x 1GB Combo SFP 1x XFP 2x Slot (TAA) Switch
SKU: NSB-0880
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Champion 10GSFP+E-LR 10GB BASE-LR 1310nm SMF SFP+ Transceiver
SKU: NSB-7005
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper EX-SFP-GE10KT13R15 1GB BASE-BX-U SMF SFP Transceiver
SKU: NSN-5740
Condition: New
Shipping: Overnight Options
Warranty: 365 days