Thanks everyone for your replies! I'll keep an eye on used, higher end stuff and see if something "better" pops up. The Mooer is tempting tho.
Thing is, my gain pedals are mostly silent alone, it's the stacking that triggers the (very annoying) noise, but that's likely due to the 1Spot+ Daisy Chain power supply I got when I sold all my pricey stuff when I stopped playing with bands.
Now things are gettin interesting again, but I'm not sure I want to shell out 200-300€ for an isolated Cioks with no guarantee the project will be fulfilled, so keeping it cheap is mandatory at the moment.