Gday Glen
I bought one of these from my local MSY on runout
https://www.amazon.com/ORICO-Chargin.../dp/B00JP47EFG
Runs happily off 12.8V, but is now harder to find as its outdated
Just look for USB hubs which have integrated "charging ports"
as most of these utilise a 12V power supply
ie
https://www.amazon.com/HooToo-9-Port...X4RBKZVA8873FB
https://www.amazon.com/dp/B014ZQ07NE..._t3_B01FRUJBMA
Andrew