@alfasteve @alfalfa339_5281 Thanks guys - I will mark this thread as closed since I found a used-parts Dealer in Germany (hence I chose him).
I am sure that you have some nice exemplars tho

The ones I bought now, will have to get sandblasted and painted in fresh Rosso anyway.
@vintagemilano Sure, I will post some at the end of this week since the car is in a storing-garage about 30km from my home and currently having her winter-sleep.
Well, I also think they are robust and this should not occur, but I already had to heli-coil every single thread for the valve covers because some previous owner seemed to be Hulk Hogan on those poor covers... which is probably why one of them cracked.