@Heruvim
I got mine from here: https://www.expansys.com/
You might want to consider import taxes and warranty, there is some discussion here, search the forum on 'Expansys' for more info.
Shipped to NZ in about a fortnight. No complaints at all from me, seems very solidly built and runs very well, new daily driver from day one.
Yet another way how to backup persist (or any other) partition even without PC, with rooted phone and Magisk: Install Magisk module "backup" and reboot.
After that using some terminal app in phone (I use Termux), first gain root access:
su
and then enter
backup persist
it will create file persist.img in folder /backup of your phone's internal storage. The path can be changed of course. I suppose same can be achieved with dd command, but the above is easier.
Instead of terminal app in the phone you can of course use adb shell from a pc.