I finally have all the manufacturer quotes even though not everyone quoted on every item or even every part of the process. Of what I can see, it looks like 2 of the 3 products can be made at a reasonable cost here in Australia with recycled plastic. The third product needs to be redesigned to lower the cost.
Of the moulds (or tooling as they say), the most expensive quote is three times the cheapest one even though everyone says they get their moulds made in Asia. Since this difference is so dramatic, I need to understand why before I choose a manufacturer. Otherwise, the reasoning for the cheaper price may hurt me later if I go that route.
More to learn every day.