It's really been a quite an adventure for me but I made it! Or I made something else!
Well let's see
I couldn't find quark cheese so I used ricotta
I couldn't find sour cream so I found a recipe to make it on my own. (Basically you mix 200g fresh cream with 50g yogurt. Let it rest for 1 day at room temperature and few hours in the fridge)
Now I have around 950g cream cheese
It doesn't taste exactly like philly- Maybe cos I didn't use original ingredients
But it tastes great anyway
My next experiment will be to use it to make cheesecake
We'll see how it will turn out