How do you find a hunter for your product launch?

As I come really close to launching "MarketFit", I have read about benefits of engaging a Hunter - both from the perspective of credibility and visibility.

I have heard that some Hunters are more focused on hunting in a niche eg only Dev tools, while others are agnostic to the niche/category. So, is it really like approaching each hunter individually and checking their interest in hunting your product or is there a forum via PH?

Also, for those who already got a hunter for their product, did you see the difference in the interest in your product? How long before did you reach out to hunters? Did they charge you money (directly or indirectly)?

Also, any Hunters reading this - would be great if you could help us.