> https://www.indiegogo.com/projects/brand-new-colored-keycaps-for-your-commodore-c64--2
> Don't know if that really became reality though...

It's still in the process of becoming reality: http://phase5.eu (project homepage)

Recent statement given three days ago on the Indiegogo comments page:
"the production of the caps is near the end, then we start printing and sorting. The production of the last cap needs much longer than the caps before. Because the mould we had to made new for the last cap, only produce one cap a shoot instead of four. You are right – that sounds idiotic. But this was the only way to make the mould affordable. [...] And we have alot of production stops, at the moment it is simple to cold in our production hall. We have the coldest January in Tyrol since 30 years, our heating fails to produce the temperature we need in the hall for production – the need to be absolutly exact. Next week it will get warmer, then we can finish the production of the caps."