Your search for "jl437a" revealed the following:
NEW HPE JL437A 10GB BASE-SR 850nm Short Reach LC SFP+ Transceiver
SKU: NSN-5221
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 58.99
• Only 2 remaining
Call if you need more
HPE JL437A 10GB BASE-SR LC Data Center Short Reach SFP+ Transceiver
SKU: NSB-5113
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 54.99
• Only 2 remaining
Call if you need more