StarTech offers a handy managed USB hub, their 5G4AINDRM-USB-A-HUB. This device packs a lot of functionality into a convenient package, but it requires an external power supply and is not shipped with one. What sort of power supplies can you use?
StarTech also offers ITB20D3250, specifically intended as a backup or replacement power supply for their line of USB hubs. This would be a smashing first choice for power supply for your new USB device from StarTech.