Here is a replacement for your standard 12v socket panel in the Astra H (04-10)
 
This Replacement includes a Pre-built panel that has a Multi USB Hub fitted, providing you with up to 30w Charging via PD Socket, a 3.1a USB-C Socket, a QC3.0 Socket and also a USB 2.0 Socket.
 
This also has a built in voltmeter which is ideal for keeping a close eye on your battery voltage which can also give you a good indication to any faults with your cars battery or alternator.
 
The panel also includes a 12v Cigarette lighter socket so you don't lose any functionality for standard 12v outlet plugs (essential for things like tyre pumps!)
 
And also, this version includes a pocket situated in the middle to keep the design partially the same as the original having that ideal spare change slot.
 
Simply remove your existing panel, and follow the brief instructions on how to connect to your car (its just two connectors to push in!) and then push the panel into place.