There's probably quite a few folk here that would be willing and able to do the work required, but I don't know of anyone near to Amsterdam or what the going rate would be in The Netherlands. As they're heavy, shipping costs will be significant.
Did you mean to post links to the two AX-Z911's twice (same page)?
I've asked this local (to me) seller for a photo of the interior. He describes the volume control as being "sometimes crackly" and the left channel as "sometimes not working"
How are those who imported new Z1010TNs from Canada doing, especially with regards to running via the transformers mentioned, please : all 100% successful ?
I bet its just a cold solder joint, you can fix it by yourself and then use some deoxit on controls, I got my 1010ax cheap because one of the channels worked intermittently, there are a lot of threads of recapping etc but most of the time capacitors are ok, the grey material at the base is just glue,
Someone has themselves a bit of a bargain there.
You can import one yourself, it's not difficult, but it takes time. At first you think you have an incredible bargain, but the costs pile on. You could do it for £450 though.