seems there is undue stress being placed on the top being "perfect".
producing the best possible top, designed for longevity, performance in weather, ease of use, line of sight with windows etc., are all considerations for consumers who actually want to regularly use/drive their vehicles. I can see most (probably 95%+) soft top shops weighing heavily on these ideas.
Fact: per today's standards, the original top was/is far from "perfect". my point, the top doesn't need to be perfect just IDENTICAL for a true restoration. materials and hardware have obviously changed in the past 50 years, but trade-offs should be considered carefully as to limit a change with aesthetics
that being said, it will never be feasible to expect a cheap maybe affordable top for most, and certainly no profit for a middle man. There has already been a remarkable top (RE: Mike Badger Tops) put into the market for those wanting perfection but at a cost. if the next goal is to produce a very good affordable top for Early FJ40/most FJ25 owners, than I would agree 100% with your objectives.
My earlier suggestions were simply my expectations and seemingly don't relate to most of your potential consumers.
and it was my understanding that the metal window rings have already been reproduced by someone Ken sourced pre this thread?