Hi
Well it certainly works for you Rik.
I dont speak Dutch and its not clear exactly which of the products you
refer to.
The end of hub appears to have been turned on a lathe.
So if you speak Dutch and have a nice big lathe in your shed you can fix
your TU58
Surely you don't need a big lathe. A small lathe, a Unimat,
a Taig/Peatol, etc would be easily big enough to make hubs for the TU58.
I hate to say it, but IMHO if you are restoring a classic computer which needs
significant mechanical work (drive rollers, pulleys, spacers, tapped bushes, etc)
then access to an engineer's lathe (and the ability to use it) is almost essential.
-tony