Searching for onyxsims cc

I found some working links pretty easily with the Wayback Machine. Pick your file host:

1drv.ms/u/s!AhJjChVqXGxcimhqBREBQ7x-ONtl
OR
simfil.es/294625/
OR
www.mediafire.com/file/o8n7ae6ow6k5f2x/OnyxSims4SpetsesBedroom2017.7z/file

Since they have stated that the reason they don't support their build/buy content anymore was not wanting to update it when EA made changes to the game, it is likely that at least one of the items in the set needs batchfixing.