This is rather too weak at 42 V (14 V x 4 A = 56 W).
The only thing I have found is:
http://www.netzteilshop.at/samsung-14...

However, I don't know how trustworthy the dealer is, nor whether S27A950D has anything to do with SA950DSL (I can't find anything about the latter). S27A950D:
https://www.samsung.com/us...

If there is a type designation on the original power supply, that might help.