Fortunately, this forum still has a group of ‘regular’ posters 
I don’t think Roberta Williams answers a lot of emails anymore, but Ken is a regular poster so he still might answer your question.
As for contacting Sierra… Don’t bother! A friend of mine bought the new KQ collection and had some questions about the manual like why are there instructions in the game manual for games that aren’t IN the collection?
He never received an answer…