While I went full nomad in South-East Asia, I added a stop in Shenzhen (China) to get inspired and see the manufacturing world over there. It took me few clicks to find few factories on Alibaba who manufactured the squeaky chicken and few exchanged messages to be able to visit their factory.
One of the challenges was the language barrier – I came across Guided Imports (https://www.guidedimports.com/) who can assist you through the whole process (finding factory, getting a sample, negotiation, mass production, QA, shipping). That was the moment when I decided to move forward with this.