Write to individual people directly (it worked for me in the past). They are incredibly helpful. Posting here will probably only get you the bystander effect.
Some enterprising YC Alum could probably make bank starting a YC consulting agency...
Consultancy is a non-scalable business, exactly the opposite of the kind of mindset YC funds...
Yes, but the kind of disruptive mindset YC funds will think about how to make some previously non-scalable business scalable. I don't know the answer here, but it's a good question.