I think you have made an excellent point. An English-speaking company will be more likely to make a set if they have good English sources to work from. Equally a Ukrainian or Italian company would be looking for sources in their mother tongue. I read some posts on this forum and think "Great, but who knows what they look like?". If there is no Osprey or Funcken book on the subject they may struggle, so I suggest if someone wants a set made, provide some good books or websites with as much detail and as many images as possible and you stand a better chance.
I am not into the books that much.And I didnt look for books in Turkey. but I have some osprey books on Turkish history.There are very good pictures from which great figures can be made.orion janissaries and hats turkish artilerry are just out of osprey books.early Ottoman army uniforms are very colorful and unique and hard to convert from existing sets.Waiting for orions ottomans cavalry and lucky toys medieval ottoman army(ceasers sculpter very goood,)
I have a binder in my collection with uniforms of the Turkish army from 1600-1900. There are very good colourplates available for the crimean war (Strelets in case you need some to cheer you up, please ask )
Beside this I've got a Turkish booklet with uniforms for the army around 1900. The title is "Ottoman military organization and uniforms 1876-190 . In the bibliography are 26 books listed as sources.