Need advice on reasonably priced tours in PNG

Hi,

I am planning to travel to PNG alone at the very beginning of January 2024 and would like to book a tour or multiple tours to explore PNG. However, so far, all the tours I found online are extortionately expensive.

I would be extremely appreciative if you could share links or names of the local travel agents or tours you used that are fair with price and offer great tours. I am looking to explore the cultural side of PNG. 

Thank you for any advice

Dee