After having at my attempts to obtain a new clockwork for one of my Maxi-Swatches through the official channels (Swatch in Switzerland did not even bother to respond to one of my numerous requests)... I started searching for a replacement myself and atleast, I have succeeded!
I have made a tutorial on how to replace it, you can find it on youtube (just search for 'maxi swatch clockwork' and you will find it) and also have a website where I sell vintage clocks, you can purchase it there if you wish...
I have one running at home at the moment, it is perfectly quiet and running very smoothly!
If you have any questions, please do ask!