WANTED: DC power adapter with  a  5.5mm DC barrel connector. (Hucknall NG15)

DC power adapter with  a  5.5mm DC barrel connector.
WANTED
DC power adapter with  a  5.5mm DC barrel connector.
Hucknall NG15
DESCRIPTION
I’m seeking a spare DC power adapter with a 5.5mm DC barrel connector? I lost mine when I last moved. Thank you