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.