Comment by Fnoord

If you don't want to spend a lot of money on this:

1) Get a Bluetooth adapter.

2) One of those cheap Chinese keyboard/mouse combinations like the one you linked (the are many more).

3) Get a cheap Chinese portable monitor with HDMI/USB-C.

4) Optionally, a powerbank for the monitor. Or get one with a battery.

You'll be done with a similar price as this 'Aurga'. Back in the Nokia days, you could use Nokia Linux device as a remote keyboard/monitor/mouse, too. So e.g. Nokia N800/Nokia N810 a better cyberdeck than a Sharp Zaurus.