Oh wow they're super fast. I more or less have accepted I only have one working window that's super slow 😂
Neat solution with the mp3 player! That's also a great place to put a spectrometer or a graphic equaliser now that I think of it. Your interior looks really nice as well compared to mine 😂

I heve fitted the subaru windows regulators over a year now and they work good.
The units were after market universal ones and took a lot of adjustments to make a good fit, so I desided not to make a howto.
It needs a little welding to the mounting points, slight bending and shortening the rail, rearange the cables.
If you look around you can find systems with small universal motors that can be used..
Mine were from a Subaru forrester but in France they have used  Smart roadstar units if my info is correct.
For the first time since 2012 I have the regulators to work fas en correct.
This is how they work now.

https://youtu.be/tDCaBLr8ay0

https://youtu.be/CiXAcr8YXt0

looks good for the price.
Not fitting in all cases.
There are also some Murena's with Lucas watherbottles.
For the Peugeot/fiat type its OK.

Indeed

Congratulations!! Very well done 

Not as good as your tips, but possibly helpful nonetheless. I wanted to replace the windscreen washer pump because the old one was barely building up any pressure. I was about to order one for £36 when I stumbled across this one, RIDEX 794W0002, for £9.95 including postage.

But what's more interesting is:

    ALFA ROMEO 5882292
    ALFA ROMEO 71711241
    CITROËN 643467
    FIAT 5882292
    FIAT 71711241
    LANCIA 5882292
    LANCIA 71711241
    PEUGEOT 643467

If this is already known, please simply delete it.

A

Now realy on the road again. TÜV Manager is happy and I can drive my car again.

Quick feedback. I ordered the tail gas lifters mentioned above in France. The delivery costs of 18 euros were almost as expensive as the parts themselves. But overall, the price was still reasonable for me. They have electrical connections, are rated at 200 Nm and work perfectly.

Thanks to Terry who had a spare in his stash

I can find a lot of old talk about this but nothing recent. 
Are there any alternative to Simon at ~15Euro for a kit of seals.