I asked Eurowise to make a metal coolant elbow for our cars and they came through pretty quickly. They were able to modify an existing part they already produce.
Full disclosure: I was given a "prototype" to test, but I'm not making any money off of this. I just want to spread awareness about the availability of the part because I know it's been a weak area on these cars since day one. It's been daily driven on my RS4 for about a month now with no problems.
The part is not cheap compared to the plastic version, but it's a lifetime part that you won't have to worry about breaking again.
This is a metal replacement for part number 1J0121087B , also known as the coolant distribution pipe.
Anyway, here it is installed on my RS4:
It can be purchased here:
http://shop.eurowise.com/product-p/ew42l.htm
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