Chosen Solution
I bought MacBook Pro 13" Retina (Late 2013-Early 2015) Keyboard from iFixit (US store) but its the wrong one. According to https://support.apple.com/en-us/HT201794 I need a Dutch layout, or at least English International. Where am I going to find this? It does not seem sold on iFixit (EU store).
Sadly, the International English or Dutch keyboards are hard to find for this series. The best I can get you to is MacBook Pro 13" Keyboard - UK (L13/14/15), Apple P/N B661-8154. Note the letter B at the beginning of the P/N that’s the language ID for the given keyboard. So if we review this Apple T/N How to identify keyboard localizations the International English will be Z661-8154 Dutch version will be N661-8154 But! If we look at the drawings we can see there is three physical case differences if we put aside the Japanese special version its really just two the US and the ISO so if you get an ISO unit it will fit and work in your Dutch case. Then its just a matter of KeyCaps which are different. There we can reuse your KeyCaps or get the needed replacements from here KeyCap parts
